Publications by Aaron H.P. Ho

 

Journal paper

 

1.          W. Yuan, H.P. Ho, S.Y. Wu, Y.K. Suen and S.K. Kong, Polarization-sensitive Surface Plasmon Enhanced Ellipsometry Biosensor using the Photoelastic Modulation Technique, Sensors and Actuators A (submitted)

2.          W. Yuan, H.P. Ho, Rebecca Lee and S.K. Kong, Surface-Enhanced Raman Scattering Biosensor for DNA detection on Nanoparticle Island Substrates, Biosensors and Bioelectronics (submitted)

3.          X. Wang, R. Zheng, Z. Liu, H. Ho, J. Xu and S.P. Ringer, Structural, optical and magnetic properties of Co-doped ZnO nanorods with hidden secondary phases, Nanotechnology (accepted).

4.          C. L. Wong, H.P. Ho, Y.K. Suen, S.K. Kong, Q.L. Chen, S.Y. Wu and W. Yuan Real-time protein biosensor arrays based on surface plasmon resonance differential phase imaging, Biosensors and Bioelectronics, 24(2008), 606-612.

5.          H. Wang, H.P. Ho and J.B. Xu, Photoelectron Spectroscopic Investigation of Nitrogen Chemical States in ZnO:(N,Ga) Thin Films, J. Appl. Phys., 103(2008), 103704 (6pp).

6.          R. K.Y. Lee, Jin Lei, R.C.Y. Ong, J.Y.N. Cheung, K.P. Fung, Chinlon Lin, H.P. Ho, B. Yu, M. Li, S.K. Kong, Polyphyllin D induces mitochondrial fragmentation and acts directly on the mitochondria to induce apoptosis in drug-resistant HepG2 cells, Cancer Letters, 261(2008), 158-164.

7.          S.Y. Wu and H.P. Ho, Single-beam self-referenced phase-sensitive surface plasmon resonance sensor with high detection resolution, Chinese Optics Letters, 6(2008), 176-178.

8.          H. Wang, H.P. Ho, K.C. Lo and K.W. Cheah, P-type ZnO films with (N,Ga) co-doping by MOVPE using DMHy dopant, Materials Chemistry and Physics, 107(2008), 244-247.

9.          C.L. Wong, H.P. Ho, K.S. Chan, P.L. Wong, S.Y. Wu and Chinlon Lin, Application of 2-D spectral surface plasmon resonance imaging to studying elastohydrodynamic lubricant (EHL) films, Tribology International, 41(2008), 356-366.

10.      K. Xue, J.B. Xu, and H.P. Ho, Nanoscale in-situ investigation of ultrathin silicon oxide thermal decomposition by high temperature scanning tunneling microscopy, Nanotechnology, 18(2007), 285709 (7pp).

11.      Wing-Cheung Law, Przemyslaw Markowicz, Ken-TyeYong, Indrajit Roy, Alexander Baev, Sergiy Patskovsky, Andrei V. Kabashin, Ho-Pui Ho,  Paras N.Prasad, Wide dynamic range phase-sensitive surface plasmon resonance biosensor based on measuring the modulation harmonics, Biosensors and Bioelectronics,  23(2007), 627-632.

12.      W. Yuan, H.P. Ho, Y.K. Suen, S.K. Kong, Chinlon Lin,  Improving sensitivity limit of surface plasmon resonance biosensors by detecting mixed interference signals, Applied Optics, 46(2007), 8068-8073.

13.      H. Wang, H.P. Ho, K.C. Lo and K.W. Cheah, Growth of P-type ZnO thin films by (N,Ga) co-doping using DMHy dopant, J. Phys. D: Appl. Phys. 40(2007), 4682-4685.

14.      K. Xue, H.P. Ho, J.B. Xu and R.Z. Wang, Electron interferometry in the proximity of amorphous ultrathin SiO2/Si, Applied Physics Letters, 90(2007), 182108-182111.

15.      K. Xue, H.P. Ho and J.B. Xu, Local study of thickness-dependent electronic properties of ultrathin silicon oxide near SiO2/Si interface, J. Phys. D: Appl. Phys. 40(2007), 2886–2893.

16.      K.F. Lei, W.C. Law, Y.K. Suen, W.J. Li, Y. Yam and H.P. Ho, S.K. Kong, A vortex pump-based optically-transparent microfluidic platform for biotech and medical applications, Proceedings of the Institute of Mechanical Engineers Part H – Journal of Engineering in Medicine, 221 H2(2007), 129-141.

17.      C.L. Wong, H.P. Ho, Y.K. Suen, Winnie W. Y. Chow, S.Y. Wu, W.C. Law, W Yuan, W.J. Li, S.K. Kong and Chinlon Lin, Two dimensional biosensor arrays based on SPR phase imaging, Applied Optics, 46(2007), 2325-2332.

18.      H.P Ho, W. Yuan, C. L. Wong, S.Y. Wu, Y. K. Suen, S.K. Kong, Chinlon Lin, Sensitivity enhancement based on application of multi-pass interferometry in phase-sensitive surface plasmon resonance biosensor, Optics Communications, 276(2007), 491-496.

19.      W. Yuan, H.P. Ho, C.L. Wong, S.K. Kong, Chinlon Lin, Surface plasmon resonance biosensor incorporated in a Michelson interferometer with enhanced sensitivity, IEEE Sensors Journal, 7(2007), 70-73.

20.      K.C. Lo, H.P. Ho, K.Y. Fu and P.K. Chu, Implantation-assisted synthesis of gallium oxide nanoribbons on gallium arsenide using carbon and nitrogen, Surface and Coatings Technology, 201(2007), 6804-6807.

21.      K.C. Lo, H.P. Ho, K.Y. Fu and P.K. Chu, Synthesis of indium oxide nanorods on indium phosphide substrate using plasma immersion ion implantation, Surface and Coatings Technology 201(2007), 6816-6818.

22.      W.Y. Luk, Q. Li, S.P. Wong, H.P. Ho, N. Ke, J.K.N. Lindner, Effects of Annealing on Structural and Magnetic Properties of Cobalt Implanted TiO2 Thin Films, in
Novel Semiconductor Materials for Room-Temperature Ferromagnetism, Proceedings of MRS, 999E(2007), paper K05-07.

23.      H.P. Ho, K.C. Lo and Y.Y. Hung, Quantitative phase demodulation from free-running Michelson interferometer by using a novel quadrature Moiré grating with misalignment error compensation, Optical Engineering, 45(2006), paper 075601-7.

24.      Y.Y. Hung, H.P. Ho and X.Y. He, Shearography: An Optical Measurement Technique and Applications, Chinese Journal of Experimental Mechanics, 21(2006), 667-688.

25.      H.P. Ho, C.L. Wong, K.S. Chan, P.L. Wong, S.Y. Wu and F. Guo, Application of 2-D spectral surface plasmon resonance to imaging of pressure distribution in elastohydrodynamic (EHD) lubricant films, Applied Optics, 45(2006) 5819-5826.

26.      H. Wang and H.P. Ho, Effect of annealing ambient flux on InAs islands grown on GaAs (001) substrates by metal-organic vapor phase epitaxy, Materials Chemistry and Physics, 93(2006), 223-227.

27.      H.P. Ho, W. C. Law, S. Y. Wu, X.H. Liu, S.P. Wong, Chinlon Lin and S.K. Kong, Surface plasmon resonance biosensor based on measuring low-level birefringence using a photoelastic modulation technique, Sensors and Actuators B, 114(2006), 80-84.

28.      C.L. Wong, H.P. Ho, K. S. Chan and Chinlon Lin, Application of spectral surface plasmon resonance to gas pressure sensing, Optical Engineering, 44(2005), 124403-124406.

29.      Y.Y. Hung and H.P. Ho, Shearography: an optical measurement technique and applications, Materials Science and Engineering: R: Reports, 49(2005), 61-87.

30.      H.P. Ho, W.C. Law, S.Y. Wu, Chinlon Lin and S.K. Kong, Real-time optical based differential phase measurement of surface plasmon resonance, Biosensors and Bioelectronics, 20(2005), 2177-2180.

31.      C.L. Wong, H.P. Ho, K.S. Chan and S.Y. Wu, Application of surface plasmon resonance sensing to studying elastohydrodynamic lubricant films, Applied Optics 44(2005), 4830-4837.

32.      S. Y. Wu, H.P. Ho, W. C. Law, Chinlon Lin and S.K. Kong, Highly sensitive differential phase-sensitive surface plasmon resonance (SPR) biosensor based on Mach-Zehnder configuration, Optics Letters, 29(2004), 2378 – 2381.

33.      H.J. Peng, S.P. Wong, H.P. Ho, Shounan Zhao,  Measurement of Orientation Dependent Stress-Optic Coefficient of GaAs Single Crystals, Appl. Phys. Lett., 84(2004), 1829-1831.

34.      K.C. Lo, H.P. Ho, K.Y. Fu, P.K. Chu, K.F. Li and K.W. Cheah, Preparation of gallium nitride thin-film and gallium oxide nano-ribbons by plasma immersion ion implantation of nitrogen into gallium arsenide, J. of Appl. Phys. 95(2004), 8178-8184.

35.      H.P. Ho, K.C. Lo, K.Y. Fu, P.K. Chu, K.F. Li and K.W. Cheah, Synthesis of beta gallium oxide nano-ribbons from gallium arsenide by plasma immersion ion implantation and rapid thermal annealing, Chemical Physics Letters, 382(2003), 573-577.

36.      L. Zhan, K.S. Chan, E.Y.B. Pun, H.P. Ho, Enhanced wavelength shift in partly gain-coupled distributed feedback lasers using quantum well intermixing, Optics Communications, 228(2003), 167-175.

37.      H.J. Peng, S.P. Wong, X.H. Liu, Y.W. Lai, H.P. Ho and Shounan Zhao, Low level birefringence detection system for stress measurement in semiconductors, Proceedings of SPIE, 5144(2003), 659-668.

38.      H.J. Peng, S.P. Wong, Y.W. Lai, X.H. Liu, H.P. Ho, and Shounan Zhao, A simplified system based on photoelastic modulation technique for low-level birefringence measurement, Review of Scientific Instruments, 74(2003), 4745-4749.

39.      H.P. Ho, K.C. Lo, G.G. Siu, C. Surya, K.F. Li and K.W. Cheah, Raman and photoluminescence spectroscopy of free-standing GaN separated from sapphire substrates by 532 nm Nd:YAG laser lift-off, Materials Chemistry and Physics, 81(2003), 99-103.

40.      H.P. Ho, W.W. Wong and S.Y. Wu, A multi-layer optical storage disc based on the frequency up-conversion effect from rare earth ions, Optical Engineering, 42(2003), 2349-2353.

41.      H.P. Ho and W.W. Lam, Application of differential phase measurement technique to surface plasmon resonance imaging sensors,  Sensors and Actuators B, 96(2003), 554-559.

42.      H.P. Ho, Y. Chan, K.C. Lo and S.Y. Wu, Misalignment measurement error compensation in a passive phase-demodulated laser interferometer, Proceedings of SPIE, 4827(2002), 409-420.

43.      H.P. Ho, W.W. Lam and S.Y. Wu, Surface plasmon resonance sensor based on the measurement of differential phase, Review of Scientific Instruments, 73(2002), 7534-7539.

44.      H.P. Ho, W.W. Wong, S.Y. Wu and E.Y.B. Pun, Multi-layered optical storage based on the frequency un-conversion effect from rare-earth ions, Jpn J. Appl. Phys., 41(2002), L641-L643.

45.      H.P. Ho, W.W. Lam, S.Y. Wu and M. Yang, Two-dimensional imaging sensor based on the measurement of differential phase related to surface plasmon resonance, Proceedings of SPIE, 4669(2002), 43-51.

46.      H.P. Ho, W.W. Wong, S.Y. Wu and E.Y.B. Pun, Multi-layered optical storage based on the frequency un-conversion effect from rare-earth ions, Proceedings of SPIE, 4645(2002), 156-164.

47.      H.C.M. Yau, S.Y. Wu, H.P. Ho and M.S. Yang, Surface plasmon resonance measurement of pyridoxal kinase-pyridoxamine binding on self-assembled monolayer, Sensors and Actuators B, 85(2002), 227-231.

48.      L. Zhan, K.S. Chan, E.Y.B. Pun, and H.P. Ho, Wavelength shift enhancement in quantum-well intermixed distributed-feedback lasers, IEEE Photonics Letters, 14(2002), 744-746.

49.      H.P. Ho, K.C. Lo and S.Y. Wu, A scanning thermocouple probe for temperature mapping, IEEE Trans Instrumentation and Measurement, 50(2001), 1167-1170.

50.      H.P. Ho, K.C. Lo, Y. Chan, R.K.Y. Li and C.M.L. Wu, Application of passive phase demodulation for the detection of laser ultrasound, Optics and Lasers in Engineering, 38(2002), 549-556.

51.      H.P. Ho, S.Y. Wu, M. Yang and A.C. Cheung, Application of white light-emitting-diode to surface plasmon resonance sensors, Sensors and Actuators B, 80(2001) 89-94.

52.      S.C. Tjong, H.P. Ho and S.T. Lee, Development of single and multi-layered metallic films on diamond by ion beam assisted deposition, Diamond and Related Materials, 10(2001), 1578-1583.

53.      S.C. Tjong, H.P. Ho and S.T. Lee, Ion beam assisted deposition of Ti/Ni, Ti/Cr and Ti/W films for diamond, Materials Research Bulletin, 36(2001) 153-160.

54.      H.P. Ho, D.T.K. Kwok, X.C. Zeng, C. Chan, and P.K. Chu, Preparation of gallium nitride (GaN) and related compounds by plasma immersion ion implantation and rapid thermal annealing, Surface and Coatings Technology, 136(2001) 142-145.

55.      H.P. Ho, K.C. Lo, P.K. Chu, K.S. Chan, J. Li, D.T.K. Kwok, E.Y.B. Pun and J.H. Marsh, Controlled intermixing in InGaAsP multiquantum wells by plasma immersion ion implantation of argon, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 173(2001), 304-310.

56.      K.S. Chan, H.P. Ho, E.Y.B. Pun, W.Y. Ruan, Effects of impurity on the ground-state transitions of a quantum dot in strong magnetic field, Communications in Theoretical Physics, 35(2001) 735-739.

57.      H.P. Ho, S.Y. Wu and P.K. Chu, A simplified photoreflectance measurement system, Measurement Science and Technology, 11(2000) 1348-1351.

58.      H.P. Ho, S.Y. Wu, K.S. Chan, E.Y.B. Pun and P. Shum, A multi-layered optical disc scheme for high density storage using transparent media, Jpn J. Appl. Phys. Pt 2, 39(2000) L597-L600.

59.      H.P. Ho, K.C. Lo, S.C. Tjong and S.T. Lee, Measurement of thermal conductivity in diamond films using a simple scanning thermocouple technique, Diamond and Related Materials, 9(2000) 1312-1319.

60.      W.Y. Ruan, K.S. Chan, H.P. Ho and E.Y.B. Pun, Preferred ground states of a quantum dot under a strong magnetic field,  J.  of Physics-Condensed Matter., 12(2000) 3911-3925.

61.      W.Y. Ruan, K.S. Chan, H.P. Ho, R.Q. Zhang and E.Y.B. Pun, Hyperspherical approach for charged excitons in quantum wells, Physical Review B - Condensed Matter, 60(1999) 5714-5720.

62.      F.K.L. Fan, S.M.S. Yeung, A.H.P. Ho and W.M.C. Ng, Extending the capacity of CD-RW, Tape Disc Business, 13(1999) 67-72.

63.      K.S. Chan, Y.H. Wong, E.Y.B. Pun, H.P. Ho and P.S. Chung, Theoretical analysis of quantum-wire fabrication by vacancy-enhanced interdiffusion of quantum wells, IEEE Journal of Selected Topics in Quantum Electronics, 4(1998) 701-705.

64.      H.P. Ho, E.Y.B. Pun, K.S. Chan and K.M. Leung, A highly stable differential optical interferometer using rotating Ronchi gratings, Applied Optics, 37(1998) 3494-3497.

65.      L.M. Lam, C.W. Kong, H.P. Ho, E.Y.B. Pun, K.S. Chan, Z.N. Fan and P.K. Chu, Plasma immersion Ar+ ion implantation induced disorder in strained InGaAsP multiquantum wells, Electronics Letters, 34(1998) 817-818.

66.      H.P. Ho, A dual probe differential interference scheme for multi-layered optical storage, Optics Communications, 147(1998) 233-236.

67.      H.T. Fung, H.P. Ho and C.W. Kam, A study of electromagnetic interference of cellular phones on medical equipment in accident and emergency department, Hong Kong Journal of Emergency Medicine, 4(1997) 74-76.

68.      H.P. Ho, A phase-locked fibre interferometer with intensity noise compensation, Electronics Letters, 33(1997) 1650-1651.

69.      H.P. Ho, Application of dual probe direct interference to multilayered high density storage: A proposal, Electronics letters, 33(1997) 621-622.

70.      H.P. Ho, Buzzer for PIR alarms, Electronics World & Wireless World, 1760(1995) 38.

71.      M. Liu, H.P. Ho, M.G. Somekh, J.M.R. Weaver, Noncontacting optical-generation of focused surface acoustic-waves using a customized zoneplate, Electronics Letters, 31(1995) 264-265.

72.      M.G. Somekh, M. Liu, H.P. Ho and C.W. See, An accurate noncontacting laser-based system for surface-wave velocity-measurement, Measurement Science and Technology, 6(1995) 1329-1337.

73.      H.P. Ho, M. Liu, C.W. See, M. Somekh and J. Weaver, Direct and indirect dual probe interferometer for accurate surface wave measurement, Measurement Science and Technology, 5(1994) 1480-1490.

74.      N. Baba-Ali, I. Harrison, H.P. Ho, B. Tuck and M. Henini, Annealing-induced dislocation loops in Si-doped GaAs-AlAs superlattices, J. of Materials Science: Materials in Electronics, 4(1993) 29-37.

75.      M.J. Hall, C. Hammond, B.J. Hickey, H.P. Ho, M.A. Howson, M.J. Walker, N. Wiser and D.G. Wright, The giant magnetoresistance of Cu/Co superlattices grown by MBE, J. of Magnetism and Magnetic Materials, 110(1992) L239-46.

76.      Harrison, H.P. Ho and N. Baba-Ali, Diffusion induced disorder in GaAs-AlAs superlattices, J. of Electronic Materials, 20(1991) 449-56.

77.      H.P. Ho, I. Harrison, N. Baba-Ali and B. Tuck, Diffusion-induced disorder in AlAs-GaAs superlattices by transition elements, J. of Electronic Materials, 20(1991) 649-52.

78.      H.P. Ho, I. Harrison, N. Baba-Ali, B. Tuck an M. Henini, The effect of arsenic pressure on the diffusion-induced disordering of tin in AlAs-GaAs superlattices, J. of Material Science: Materials in Electronics, 2(1991) 137-40.

79.      N. Baba-Ali, I. Harrison, B. Tuck, H.P. Ho and M. Henini, Sulphur diffusion in GaAs-AlAs superlattices, Optical and Quantum Electronics, 23(1991) S813-21.

80.      H.P. Ho, I. Harrison, N. Baba-Ali and B. Tuck, Diffusion-induced defects in GaAs by Zinc and the effects of post-diffusion anneal, J. of Appl. Phys., 69(1991) 3494-3502.

81.      T.M. Benson, N.M. Kassim, H.P. Ho and D.E. Davies, Waveguide technology for silicon photonic circuits, Proceedings of IEE Colloquium, Silicon Today (1990) 14-19.

82.      N. Baba-Ali, I. Harrison, B. Tuck, H.P. Ho, M. Henini and O.H. Hughes, Annealing of GaAs/AlAs superlattices, J. of Material Science:Materials in Electronics, 1(1990) 133-136.

83.      H.P. Ho, I. Harrison, B. Tuck, M. Henini and O.H. Hughes, The effect of As on Zn diffusion-induced disorder in AlAs-GaAs superlattices, Semicond. Sci. Technol., 5(1990) 561-565.

84.      H.P. Ho, I. Harrison, B. Tuck, M. Henini and O.H. Hughes, Zn diffusion-induced disorder in AlAs-GaAs superlattice, Semicond. Sci. Technol., 4(1989) 841-846.

 

Book Contribution

1.          H.P. Ho: "Preparation of Semiconductor Devices for TEM", in: A.W. Robards and A.J. Wilson (eds), Procedures in Electron Microscopy, John Wiley and Sons 1993

2.          H.P. Ho and S.Y. Wu “Bio-molecule Sensing using surface plasmon resonance (SPR)”, in: Tuan Vo-Dinh (ed), Nanotechnology in Biology and Medicine: Methods, Devices and Applications, CRC Press, LLC (in press).

 

Invited Presentation

 

1.          H.P. Ho, Solar Energy - An Important Topic for 21st Century, in Innovation Festival 2008, Hong Kong, 16-18 October 2008.

2.          H.P. Ho, Joint University BME Programmes - a possible platform for multi-disciplinary research and education, in Hong Kong Biomedical Engineering International Conference (BME 2008), 23-25 October 2008, Hong Kong. (Keynote Presentation)

3.          H.P. Ho, C. L. Wong, S.Y. Wu,  W. Yuan, Q.L. Chen, Y.K. Suen and S.K. Kong, Surface Plasmon Resonance Photonic Biosensors, in Photonic Science and Technology for Tera-Era, 2008 Spring X-Photonics Workshop, National Chiao Tung University, Hsinichu, Taiwan, 19-20 May 2008.

4.          H.P. Ho and S.Y. Wu, Single-beam self-reference phase-sensitive surface plasmon resonance sensor with high detection resolution, Asia Optical Fiber Communication & Optoelectronics Exposition & Conference, Shanghai, China, 17-19 October 2007.

5.          W-C. Law, A. Baev, S. Patskovsky, K-T. Yong, I. Roy, A. Kabashin, H.P Ho, P.N.Prasad, Sensitivity Enhancement of surface plasmon resonance biosensor by using metallic nanoparticles,  in 2nd Annual Advanced Optical Methods Workshop, Shenzhen University, Shenzhen, China 29-31 May 2007.

6.          H.P. Ho, C.L. Wong, , S.Y. Wu, W. Yuan, C. Lin and S.K. Kong, Highly Sensitive Photonic Biosensors Based on Surface Plasmon Resonance, International Symposium on Biophotonics, Nanophotonics and Metamaterials, Honzhou, China, 16-18 October 2006.

7.          H.P. Ho, Surface plasmon resonance biosensor arrays based on interferometric phase imaging, in 1st Annual Advanced Optical Methods Workshop, Shenzhen University, Shenzhen, China, 26-28 May 2006.

8.          H.P. Ho, Surface Plasmon Resonance Biosensor Arrays Based on Interferometeric Detection, in JILA (Joint Institute for Laboratory Astrophysics) Workshop on Interferometric/Surface Plasmon Resonance Array Biosensors, Boulder, Colorado,18 April 2006.

9.          H.P. Ho, Development of low-cost biosensor arrays based on phase imaging of surface plasmon resonance, in 18th Annual Meeting of the IEEE Lasers and Electro-optics Society (LEOS 05), Sydney, Australia, 23-27 October 2005.

10.      H.P. Ho,  Nano-sized Gallium Oxide and Indium Oxide Materials Synthesized by Ion Implantation, in 5th WIMNACT – Workshop and IEEE EDS Mini-colloquium on Nanometer CMOS Technology, City University of Hong Kong, Organized by IEEE ED/SSC Hong Kong Chapter, 18 September 2004.

11.      H.P. Ho, Highly Sensitive Surface Plasmon Resonance Biosensor based on Interferometric Phase Detection, in Roadshow and Seminar of Greater China Photonics Industries and Business Opportunity, organized by Hong Kong Optoelectronics Association, 2 April 2004.

12.      H.P. Ho, Formation of b-Ga2O3 Nano-ribbons and Nano-rods by Plasma Immersion Ion Implantation and Rapid Thermal Annealing, in International Workshop on Interactions between Nanostructure and Particle Beams, Shanghai, China, 11-13 March 2004.

13.      H.P. Ho, A Brief Review on Highly Sensitive Photonic Biosensors, in 2004 International Technology Conference – Technology Drivers for Tomorrow: Photonics and Bio-photonics, organized by Hong Kong Science and Technology Park 10-11 February 2004.

14.      H.P. Ho, Emerging New Technology in Photonics: Bio-Photonic Sensors, in Greater China Photonics Industries & Business Opportunities Forum 2003, Hong Kong Science and Technology Park, 2-5 December 2003.

15.      H.P. Ho, Synthesis of Nano-Sized Gallium Oxide Ribbons and Rods by Plasma Immersion Ion Implantation, in Hong Kong Workshop on Interactions between Nanostructure and Particle Beams, City University of Hong Kong,  28 November 2003.

16.      H.P. Ho, Photonic Sensors for Biomedical Applications, in Driving on the Technology Highway of Hong Kong, seminar series organized by HKCCMA, AHKEA, HKOEA and HKPC 14 July 2003.

17.      H.P. Ho, Optical chemical sensors based on the surface plasmon resonance effect, Institute of Materials Research and Engineering, Singapore, 10 May 2002.

 

Patent

1.          H.P. Ho, C.L. Wong, S.Y. Wu, W.C. Law, Chinlon Lin and S.K. Kong    Optical Sensing Devices with SPR Sensors Based on Differential Phase Interrogation and Measuring Method Using the Same, U.S. Patent Pending (08/2005).

2.          H.P. Ho, S.Y. Wu, C. Lin, S.K. Kong, A simple differential phase imaging surface plasmon resonance sensor using liquid crystal modulator, U.S. Patent Pending (01/2006).

3.          S.Y. Wu, H.P. Ho, Y.K. Suen, S.K. Kong, W.W. Wong, K.C. Lo, Method and Apparatus for Phase Sensitive Surface Plasmon Resonance, U.S. Provisional Patent Pending (03/2008).

 

Conference Paper

 

1.          W. Yuan, H.P. Ho, S.K. Kong and Daniel H.C. Ong, Surface-Enhanced Raman Spectroscopy on Gold Nano-particle Functionalized Metallic Surface with Surface Plasmon Resonance Biosensing Capability, in OSA Topical Conference on Nanophotonics 2008, Nanjing, China, 27-29 May 2008.

2.          W. Yuan, H.P. Ho, Rebecca K.L. Lee and S.K. Kong, Surface-Enhanced Scattering Biosensor on Nanoparticle Island Substrates for DNA Detection, in Asia Optical Fiber Communication and Exposition & Conference (AOE), Shanghai, China, 30 October-2 November 2008.

3.          S.Y. Wu and H.P. Ho, Wide dynamic range phase-sensitive surface plasmon resonance sensors by incorporating tunable materials in the sensor layer, in 10th World Congress on Biosensors, Shanghai, China, 14-16 May 2008.

4.          W. Yuan, H.P. Ho, Y.K. Suen, S.K. Kong, C. Lin and P.N. Prasad, Surface-enhanced Raman spectroscopy on a surface plasmon resonance biosensor platform for gene diagnostics, BIOS 2008, in SPIE Photonics West, San Jose, USA, 19-24 January 2008.

5.          S.Y. Wu and H.P. Ho, Highly sensitive single-beam phase-sensitive surface plasmon resonance biosensor with a wide dynamic range, BIOS 2008, in SPIE Photonics West, San Jose, USA, 19-24 January 2008.

6.          Q.L. Chen, H.P. Ho, L. Jin, B.W. Chu, M.J. Li, V.W. Yam, Dissolved oxygen sensing using organometallic dyes deposited within a microfluidic environment, MOEMS-MEMS 2008, in SPIE Photonics West, San Jose, USA, 19-24 January 2008.

7.          H.P. Ho and S.Y. Wu, Simulation of a novel high sensitivity and wide dynamic range phase-sensitive surface plasmon resonance sensor, IEEE Conference on Electron Devices and Solid-State Circuits, Hong Kong, 20 -22 December 2007.

8.          K.C. Lo, H. Wang, H.P. Ho and P.K. Chu, Selective-area Growth of Gallium Oxide Nanowires: Synthesis, Characterization, and Device Application, IEEE Conference on Electron Devices and Solid-State Circuits, Hong Kong, 20 -22 December 2007.

9.          L. Jin, R.K. Lee, S.K. Kong, W. Yuan, H.P. Ho and C. Lin, Application of total internal refelction fluorescence (TIRF) microscopy in cellular bio-imaging, Asia Optical Fiber Communication & Optoelectronics Exposition & Conference, 17-19 October 2007, Shanghai, China.

10.      W.Y. Luk, H.P. Ho, N. Ke, J.K.N. Lindner, Annealing effects on structural and magnetic properties of cobalt doped TiO2 thin film by ion implantation, The 7th IEEE International Conference on Nanotechnology, 2-5 August 2007, Hong Kong.

11.      H. Wang, K.C. Lo, H.P. Ho, Effect of Growth Conditions on the Surface Morphology of ZnO Prepared by Metal-organic Vapor Phase Epitaxy, The 7th IEEE International Conference on Nanotechnology, 2-5 August 2007, Hong Kong.

12.      K.C. Lo, H. Wang, H.P. Ho, Synthesis of ZnO film on GaAs substrate by metal-organic chemical vapor deposition, The 7th IEEE International Conference on Nanotechnology, 2-5 August 2007, Hong Kong.

13.      W.Y. Luk, Q. Li, S.P. Wong, H.P. Ho, N. Ke, J.K.N. Lindner, Effects of Annealing on Structural and Magnetic Properties of Cobalt Implanted TiO2 Thin Films, MRS Spring Meeting 2007, April 9 - 13, 2007, San Francisco, USA.

14.      C.L. Wong and H.P. Ho, Imaging Differential Phase Surface Plasmon Resonance Biosensors, The 19th Annual Meeting of the IEEE Lasers and Electro-optics Society (LEOS 06), 29 October -2 November 2006, Montreal, QC, Canada. 

15.      C.L. Wong, H.P. Ho, Y.K. Suen, C. W. Yin, W.J. Li, S.K. Kong and Chinlon Lin, Biosensor arrays based on surface plasmon resonance phase imaging, International Symposium on Biophotonics, Nanophotonics and Metamaterials, Honzhou, China, 16 - 18 October 2006.

16.      W. Yuan, H.P. Ho, C.L. Wong, S.Y. Wu, Y.K. Suen, S.K. Kong, Chinlon Lin, Sensitivity enhancement of phase-sensitive surface plasmon resonance biosensor using multi-pass interferometry, International Symposium on Biophotonics, Nanophotonics and Metamaterials, Honzhou, China, 16 - 18 October 2006.

17.      L. Jin, D.Y. Chen, L. Huo, W. Yuan, Y.H. Luo, H.P. Ho and C. Lin, Technique for false image correction in second harmonic generation microscopy by modulating laser polarization, International Symposium on Biophotonics, Nanophotonics and Metamaterials, Honzhou, China, 16 - 18 October 2006.

18.      K. Xue, H.P. Ho, J.B. Xu, Surface Chemical Reaction Observed in Nanometer Scale by in-situ Hot Scanning Tunneling Microscopy, International Conference on Nanoscience and Technology 2006, Basel, Switzerland, July 30 – August 04, 2006.

19.      S.Y. Wu, C.L. Wong, H.P. Ho, S.K. Kong and Chinlon Lin, Application of Fabry-Perot interferometer for signal amplification in phase-sensitive surface plasmon resonance biosensors, Biosensors 2006, The 9th World Congress on Biosensors, Toronto, Canada, 10 -12 May 2006.

20.      H. Wang, K.C. Lo and H.P. Ho, Defect luminescence from N-doped ZnO thin films, 2006 MRS Spring Meeting, San Francisco, USA, April 17 - 21, 2006.

21.      K. Xue, J.B. Xu, H.P. Ho, L. Wang, Self-organized SiO2/Si nanostructures formed by the competing process of thermal oxidation and etching, 2006 MRS Spring Meeting, San Francisco, USA, April 17 - 21, 2006.

22.      K.C. Lo, H.P. Ho, C.M. Wu, K.Y. Fu, P.K. Chu, Selective area growth of gallium oxide nanowires on gold patterned gallium arsenide using implantation-assisted technique, 2006 MRS Spring Meeting, San Francisco, USA, April 17 - 21, 2006.

23.      H. Ho, S. Wu, C. Wong, S. Kong and, C. Lin, Imaging surface plasmon resonance sensor based on the use of Fabry-Perot cavity, BIOS 2006, in SPIE Photonics West, San Jose, USA, 21-26 January 2006.

24.      S. Wu and H. Ho, A bio-imaging biosensor chip design based on phase-stepping interferometry of surface plasmon resonance, BIOS 2006, in SPIE Photonics West, San Jose, USA, 21-26 January 2006.

25.      H.P. Ho, C.L. Wong, K.F. Lei, W.J. Li, K.S. Chan, W.C. Law, S.Y. Wu, S.K. Kong and C. Lin, Two dimensional phase sensitive surface plasmon resonance biosensor array using microfluidic flow circuit platform, IEEE Conference on Electron Devices and Solid-State Circuits, Hong Kong, 19-21 December 2005.

26.      K. Xue, J. An, L. Wang, X.J. Yu, H.P. Ho and J. B. Xu, Local study of dc and dynamic electricl stress induced ultrathin gate oxide soft-breakdown by scanning tunnelling microscopy, IEEE Conference on Electron Devices and Solid-State Circuits, Hong Kong, 19-21 December 2005.

27.      H.P. Ho and S.Y. Wu, Highly-sensitive imaging surface plasmon resonance biosensor for high-throughput multiple analyte detection, Conference on BioMEMS and Nanotechnology II, in SPIE International Symposium on Microelectronics, MEMS, and Nanotechnology, Brisbane, Australia, 11-14 December 2005.

28.      K.C. Lo, H.P. Ho, K.Y. Fu and P.K. Chu, Implantation-assisted synthesis of gallium oxide nanoribbons on gallium arsenide using carbon and nitrogen, The 8th International Workshop on Plasma-based Ion Implantation and Deposition, Chengdu, China, 18 – 22 September 2005.

29.      K.C. Lo, H.P. Ho, K.Y. Fu and P.K. Chu, Synthesis of indium oxide nanorods on indium phosphide substrate using plasma immersion ion implantation, The 8th International Workshop on Plasma-based Ion Implantation and Deposition, Chengdu, China, 18 – 22 September 2005.

30.      H.P. Ho, C.L. Wong, K.F. Lei, W.J. Li, C. Lin and S.K. Kong, Surface plasmon resonance phase sensor arrays on a microfluidic platform, International Conference on Photonics and Imaging in Biology and Medicine, Tianjin, China, 3-6 September 2005.

31.      H. Ho, S. Wu, C. Wong, W. Law, S. Kong, C. Lin, Two-dimensional surface plasmon resonance biosensor array based on phase-sensitive measurement, SPIE Optics and Photonics 2005,  San Diego, USA, 31 July-4 August 2005.

32.      G. Vienne, Y. Min, Y. Luo, T. K. Liang, H. P. Ho, C. Lin, Liquid core fibers based on hollow core microstructured fibers, 2005 CLEO/IQEC Pacific Rim Conference, Tokyo, Japan, 11-15 July, 2005.

33.      Kin Fong Lei, Wing Cheung Law, Yick-Keung Suen, Wen J. Li, Ho Pui Ho, Chinlon Lin and Siu-Kai Kong, Automating Micro Cellular Detection Process Using All-Transparent Microfluidic Platform and Surface Plasmon Resonance Technique,  5th IEEE Conference on Nanotechnology, Nagoya, Japan, 11-15 July 2005, pp. 490 – 493.

34.      S. Y. Wu, H. P. Ho, Chinlon Lin, and S. K. Kong, Highly sensitive differential phase-sensitive surface plasmon resonance biosensor with optimized phase extraction algorithm, 2005 CLEO/IQEC Conference, Baltimore, Maryland, USA, 24-26 May, 2005.

35.      G. Vienne, Y. Min, Y. Luo, T. K. Liang, H. P. Ho, C. Lin, Liquid core fibers based on hollow core microstructured fibers, 2005 CLEO/IQEC Conference, Baltimore, Maryland, USA, 24-26 May, 2005.

36.      H. P. Ho, C.L. Wong, S.Y. Wu,  C. Lin and S. K. Kong, Imaging Phase-sensitive SPR Micro-array Biosensor,  International Symposium on Photonics, Biophotonics, and Nanophotonics, Nanjing (ISPBN’05), China, 14 – 18 May, 2005.

37.      H.P. Ho, S.Y. Wu, W.C. Law and Chinlon Lin, Application of differential phase detection for sensitivity improvement in surface plasmon resonance sensors, The Second Asia Pacific Rim Symposium on Biophotonics, Taipei, Taiwan, 15-17 December, 2004.

38.      H.P. Ho, S.Y. Wu, C. Lin, Differential phase surface plasmon resonance biosensors, SPIE Photonics Asia Conference, Beijing, China, 8-12 November, 2004.

39.      H. Wang, and H.P. Ho, Preparation of InAs quantum dots on GaAs substrate by metal-organic vapor phase epitaxy using N2 as carrier gas, The 7th International Conference on Solid-State and Integrated-Circuit Technology, Beijing, China, 18-21 October, 2004.

40.      S.Y. Wu, H.P. Ho, Chinlon Lin and S.K. Kong, Application of a liquid crystal polarization modulator to phase-sensitive surface plasmon resonance biosensor, 2004 IEEE LEO Summer Topicals Meeting Series – Biophotonics, San Diego, USA, 28-29 June 2004.

41.      H.P. Ho, S.Y. Wu, W.C. Law and Chinlon Lin, Highly sensitive surface plasmon resonance optical biosensor based on the use of differential phase Mach-Zehnder interferometer, 2004 CLEO/IQEC Conference, San Francisco, California, 16-21 May, 2004.

42.      W.C. Law, S.Y. Wu, H.P. Ho and C. Lin, Real-time optical based differential phase measurement of surface plasmon resonance, The 8th World Congress on Biosensors, Granada, Spain, 24-26 May 2004.

43.      H.P. Ho, P.L. Wong, C.L. Wong, S.Y. Wu and F. Guo, Application of surface plasmon resonance to measurement of hydrostatic pressure in tribological lubricant layers, IEEE Conference on Electron Devices and Solid-State Circuits, Hong Kong, 16-18 December 2003.

44.      S. Y. Wu, L.C.M. Wu,  H.P. Ho and Chinlon Lin, A differential measurement approach for improving surface plasmon resonance phase sensing performance, The 6th Chinese Optoelectronics Symposium, COES’03, Hong Kong, September 12-14, 2003.

45.      K.C. Lo, H.P. Ho, P.K. Chu and K.W. Cheah, Synthesis of gallium nitride film and gallium oxide nano-ribbons by plasma immersion ion implantation of nitrogen into gallium arsenide, The 6th Chinese Optoelectronics Symposium, COES’03, Hong Kong, September 12-14, 2003.

46.      K.C. Lo, H.P. Ho, P.K. Chu and S.P. Wong, Preparation of crystalline gallium oxide ribbons on gallium arsenide by plasma immersion ion implantation and rapid thermal annealing, Symposium T9.3, Nanostructuring Materials with Energetic Beams, 2003 MRS Spring Meeting, San Francisco, USA, April 22 - 23, 2003.

47.      S.Y. Wu and H.P. Ho, A theoretical model for the sensitivity improvement of the surface plasmon resonance optical sensor by using gold-silver transducing layer, 9th International Meeting on Chemical Sensors, Boston, USA, 7-10 July 2002.

48.      S.H. Pun, W.W. Lam, H.P. Ho and Y.T. Zhang, A preliminary study on optical measurements of glucose concentration using a surface plasmon resonance system, IEEE-EMBS Special Topic Conference on Molecular, Cellular and Tissue Engineering, Houston, USA, October 23-26, 2002.

49.      H.P. Ho, J. C. Y. Chung, K. C. Ng, K. L. Cheng, S. Y. Wu, Novel far infrared imaging sensor based on the use of titanium-nickel shape memory alloys, SPIE Conference on Smart Materials, Nano-, and Micro-Smart Systems , Melbourne, Australia, 16–18 December 2002. Proceedings of SPIE, 4935(2002), 69-73.

50.      H.P. Ho, K.C. Lo, G.G. Siu and C. Surya, Raman spectroscopy study on free-standing GaN separated from sapphire substrates by 532nm Nd:YAG laser lift-off, IEEE Hong Kong Electron Device Meeting, Hong Kong, 22 June 2002.

51.      H.P. Ho, W. W. Wong, S. Y. Wu and E.Y.B. Pun, Optical storage disc based on the frequency up-conversion effect from rare earth ions, Hong Kong, 22 June 2002.

52.      H.P. Ho, W. W. Lam, P.L. Wong and F. Guo, Application of differential phase measurement technique to surface plasmon resonance imaging sensors, IEEE Hong Kong Electron Device Meeting, 22 June 2002.

53.      H.P. Ho, C.Y. Chung, K.C. Ng, K.L. Cheng and S.Y. Wu,   Application of shape memory alloy as detector material for far-infrared imaging transducers, IEEE Hong Kong Electron Device Meeting, 22 June 2002.

54.      S.Y. Wu and H.P. Ho, Sensitivity improvement of the surface plasmon resonance optical sensor by using a gold-silver transducing layer, IEEE Hong Kong Electron Device Meeting, 22 June 2002.

55.      H.P. Ho and C.L. Wong, Application of spectral surface plasmon resonance for gas pressure sensing, IEEE Hong Kong Electron Device Meeting, 22 June 2002.

56.      H.P. Ho, W.W. Lam, S.Y. Wu and M. Yang, Two-Dimensional imaging sensor based on the measurment of differential phase related to surface plasmon resonance, IS&T/SPIE 14th Annual Symposium: Electronic Imaging 2002, Science and Technology, San Jose, USA, 20-25 January 2002. Proceedings of SPIE, 4966(2002), 8.

57.      H.P. Ho, W.W. Wong, S.Y.Wu and E.Y.B. Pun, Multi-layered optical storage based on the frequency un-conversion effect from rare-eatch ions, IS&T/SPIE 14th Annual Symposium: Electronic Imaging 2002, Science and Technology, San Jose, USA, 20-25 January 2002. Proceedings of SPIE, 4645(2002), 156-164

58.      H.P. Ho and W.M.C. Ng, AFM characterisation of phase change media, International Symposium on Optical Memory 2001, Taipei, Taiwan, 16-19 October 2001.

59.      H.P. Ho, W.W. Lam, S.Y. Wu and M. Yang, A chemical sensor based on the measurment of differential phase related to surface plasmon resonance, IEEE Hong Kong Electron Device Meeting, Hong Kong, 30 June 2001.

60.      W.M.C. Ng and H.P. Ho, An AFM study on the degradation of phase-change recordable compact discs, IEEE Hong Kong Electron Device Meeting, Hong Kong, 30 June 2001.

61.      W.W. Wong, H.P. Ho, K.S.Chan and E.Y.B.Pun, Optical storage disc based on the frequency up-conversion effect from rare earth ions, The Fifth Cross-strait Optoelectronics Conference, Xiamen, China, 31 March- 9 April 2001.

62.      H.P. Ho, S.Y. Wu, A. Cheung, K.S. Chan and E.Y.B. Pun, Application of white light-emitting didodes in spectral surface plasmon resonance liquid sensors, SPIE International Symposium on Optics and Optoelectronic Inspection and Control: Techniques, Applications and Instruments, Beijing, China, 8-10 November 2000.  

63.      S.C. Tjong, H.P. Ho and S.T. Lee, Development of multi-layered films on diamond by ion beam deposition, 7th International Conference on New Diamond Science and Technology, Hong Kong,  23-28 July 2000.

64.      H.P. Ho, W.W.Lam, S.Y.Wu and M.Yang, Two-dimensional imaging sensor based on the measurement of differential phase related to surface plasmon resonance, Workshop on Progress in Optical Surface Waves, 24th May 2001, The Institute of Physics, London.

65.      D. T. K. Kwok, A. H. P. Ho, X. C. Zeng, C. Chan, P. K. Chu, and S. P. Wong, Formation of Gallium Nitride (GaN) Transition Layer by Plasma Immersion Ion Implantation and Rapid Thermal Annealing, Materials Research Society Spring Meeting, San Francisco, California, Paper K5.29, April 24 - 28, 2000.

66.      H.P. Ho, K.C. Lo, W.L. Fong, C.M.L. Wu, K.S. Chan and E.Y.B. Pun, Interferometric detection of ultrasound using a simple passive grating demodulation scheme, International Symposium on Optics and Optoelectronic Inspection and Control: Techniques, Applications and Instruments, Beijing, China, 2000.

67.      H.P. Ho, W.L. Fong, C.M.L. Wu, K.S. Chan and E.Y.B. Pun, An intensity-noise compensated laser interferometer based on the use of a passive split-field grating phase demodulation scheme, Applied Optics and Opto-Electronics Conference, Loughborough, U.K., 2000.

68.      E.M.W. Wong, H.P.Chan, P.Shum, W.A.Gambling, H.P. Ho and S.T. Lee, Fabrication of UV-sensitive waveguides for integrated photonics applications, SPIE's 45th Annual Meeting, The International Symposium on Optical Science and Technology, San Diego, California, USA, 2000. Proceedings of SPIE, 4110(2000), 44.

69.      A.H.P. Ho, W.M.C. Ng, F.K.L. Fan and S.M.S. Yeung, Optimisation of storage capacity in phase-change re-writable optical discs, The Fifth IUMRS International Conference on Advanced Materials, China International Exhibition Center, Beijing, China , 1999.

70.      L.M. Lam, H.P. Ho, K.S. Chan, P.K. Chu and E.Y.B. Pun, Dosage and Strain Effects on Diffusion Induced Disorder in InGaAsP MQW Structures due to Plasma Immersion Ion Implantation of Argon, The Fifth IUMRS International Conference on Advanced Materials, China International Exhibition Center, Beijing, China, 1999.

71.      H.P. Ho, Qinqing Yang, L.M. Lam, K.S. Chan, E.Y.B. Pun and Xuejin Yan, Relative Red-shift of Photoluminescence Peaks by Pulsed-laser-induced Effects in InGaAsP Multiquantum Well Structures, The Fifth IUMRS International Conference on Advanced Materials, China International Exhibition Center, Beijing, China, 1999.

72.      T.M. Mok, K.M. Leung, H.P. Ho, J.C.L. Chan and C.N. Ng, Lidar probing of the urban nocturnal boundary layer, SPIE’s First International Asia-Pacific Symposium on Remote Sensing of the Atmosphere, Environmental Monitoring, China International Exhibition Center, Beijing, China, 1998.

73.      T.M. Mok, K.M. Leung, J.C.L. Chan, H.P. Ho, and C.N.Ng, Lidar Observation of the Nocturnal Inversion Transition in the Lower Atmosphere over Hong Kong, 19th International Laser Radar Conference (ILRC), Annapolis, Maryland, USA, 1998.

74.      K.S. Chan, Y.H. Wong, E.Y.B. Pun, H.P. Ho and P.S. Chung, Analysis of quantum wire formation due to the vacancy-enhanced interdiffusion, The Third Optoelectronics and Communication Conference (OECC 98), Nippon Convention Centre, Makuhari Messee, Chiba, Japan, 1998.

75.      Y.H. Wong, K.S, Chan, E.Y.B. Pun, H.P. Ho, P.S. Chung and J. Marsh, A numerical study of spatially controlled impurity-free vacancy enhanced quantum well intermixing, Integrated Photonics Research Topical Meeting, Victoria, B.C., Canada, 1998.

76.      K.M. Leung, T.M. Mok, K.Y. Chan, H.P. Ho, C.N. Ng, J.C.L. Chan and J.L. Gao, Tracking urban planetary boundary layer of Hong Kong by aerosol monitoring, CEReS International Symposium on the Atmospheric Correction of Satellite and its Application to Global Environment, Chiba University, Japan 1998.

77.      W.S. Ring, A.J. Taylor, R.Hoodless, A.H.P. Ho, I.S. Smith, F. Wijnands and R.M. Ash, Strained-layer 1300-nm gain-coupled DFB lasers for uncooled applications, IEEE Technical Digest Series, Piscataway, NJ, USA, 97CH36049, Conference on Optical Fiber Communication, 1997.

78.      H.P. Ho, M.G. Somekh, S.W. See, Accurate measurement of surface acoustic wave velocity by dual probe double heterodyne interferometer, Institute of Physics, Applied Optics and Optoelectronics Conference, York, UK., 1994.

79.      H.P. Ho, M.G. Somekh, R.D. Holmes and R.K. Appel, Extended focus phase imaging in scanning microscope system, Institute of Physics, Applied Optics and Optoelectronics Conference, Leeds, U.K., 1992.

80.      D.E. Davies, H.P. Ho, N. Mohd Kassim and T. M.Benson, Assessment of SIMOX material by optical waveguide, 20th European Solid State Device Research Conference, Nottingham, U.K., 1990.

81.      N. Baba-Ali, I. Harrison, B. Tuck and H.P. Ho, Silicon induced disordering in GaAs/AlAs superlattices, Proceedings of the XIIth International Congress for Electron Microscopy, Seattle, Washington, USA, 1990.

82.      N. Baba-Ali, B. Tuck, I. Harrison, H.P. Ho, The diffusion of silicon in AlGaAs based materials, Institute of Physics, Solid State Conference, Warwick, 1989.

83.      H.P. Ho, I. Harrison, B. Tuck, Impurity induced disordering in Al-GaAs multiquantum well structures of Zinc diffusion, Institute of Physics, Solid State Physics Conference, Nottingham, 1988.