Ray Lai
Ray Ying-Hoi Lai, Ph.D.
Senior Engineer
Materials & Corrosion Engineering
Hong Kong

Dr. Lai specializes in material characterization techniques including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Auger electron spectroscopy as well as physical vapor deposition processes for metal and semi-conductor thin films. He also has extensive experience in the design, modification, operation and maintenance of ultra-high vacuum (UHV) components.

Prior to joining Exponent, Dr. Lai was a research associate for the Department of Physics at the Hong Kong University of Science and Technology (HKUST) with a focus on semiconducting thin film and nanostructure fabrication using a II-VI MBE system optimized for high temperature material growth. His PhD thesis focused on magnesium sulfide thin films grown with molecular beam epitaxy (MBE) for solar-blind short-wavelength ultraviolet detection in flame sensing applications.

While working as a laboratory technician at HKUST, Dr. Lai assisted general physics demonstrations and provided a wide range of technical support to teaching faculty and students. He is also familiar with hands-on techniques such as prototype fabrication, computer aided design (CAD) and additive manufacturing.

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., NanoScience and Technology, Hong Kong University of Science & Technology, China, 2015
  • M.Phil., Mechanical Engineering, Hong Kong University of Science & Technology, China, 2009
  • B.Sc., Physics, Hong Kong University of Science & Technology, China, 2006

LICENSES & CERTIFICATIONS

BSI ISO9001:2015 Lead Auditor Training Course, 2016

LANGUAGES

  • Chinese

Publications

HE QL, Lai YH, Liu Y, Beltjens E, Qi J, Sou IK. High performance CaS solar-blind UV photodiodes fabricated by seed-layer-assisted growth. Applied Physics Letters 2015; 107:181903.

Lai YH, He QL, Cheung WY, Lok SK, Wong KS, Ho SK, Tam KW, Sou IK. Molecular beam epitaxy-grown wurtzite MgS thin films for solar-blind ultra-violet detection. Applied Physics Letters 2013; 102:171104.

Lai YH, Cheung WY, Lok SK, Wong GKL, Ho SK, Tam KW, Sou IK. Rocksalt MgS solar blind ultra-violet detectors. AIP Advances 2012; 2:012149.

HE QL, Liu H, He M, Lai YH, He H, Wang G, Law KT, Lortz R, Wang J, Sou IK. Two-dimensional superconductivity realized in an MBE-grown Bi2Te3/FeTe heterostructure. Nature Communications 2014; 5.

Lok SK, Tian JC, Wang Y, Lai YH, Lortz R, Petrovic A, Panagopoulos C, Wong GK, Wang G, Sou IK. Factors affecting the shape of MBE-grown laterally aligned Fe nanowires. Nanotechnology 2012; 23(48).

Cheong P, Chang KF, Lai YH, Ho SK, Sou IK, Tam KW. A ZigBee-based wireless sensor network node for ultraviolet detection of flame. IEEE Transactions on Industrial Electronics 2011; 58:5271.

Lai YH, Gao Y, Zhang Y, Wang J. A study of CFD models for investigating the water beam assisted form error in-process optical measurement. Key Engineering Materials 2010; 437:472–476.

Presentations


Lai YH. MBE-grown magnesium and calcium sulphides based solar-blind UV detectors. South University of Science and Technology, Shenzhen, China, 2015.

Lai YH. MgS Schottky barrier devices: a candidate for solar-blind UV sensing. The 15th Conference of the Physical Society of Hong Kong, Oral Presentation, Hong Kong, 2012. Awarded: Best Student Presentation Award.

Lai YH, Lok SK, Tam KW, Ho SK, Sou IK. MgS solar blind ultraviolet detectors. The 16th International Conference on Molecular Beam Epitaxy, Berlin, Germany, 2010.

Lai YH, Gao Y, Zhang Y, Wang JX. A study of CFD models for investigating the water beam assisted form error in-process optical measurement. The 9th International Symposium on Measurement Technology and Intelligent Instruments, Oral Presentation, Saint Petersburg, Russia, 2009.

Patents

US Patent No. 8592935: MgS solar blind UV radiation detector. Sou IK, Lai YH, Lok SK, Cheung WY, Wong George KL, Tam KW, Ho SK, Nov 2013.

Prior Experience

Research Associate, Department of Physics, HKUST, 2015–2016

Technician, Department of Physics, HKUST, 2006–2009

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., NanoScience and Technology, Hong Kong University of Science & Technology, China, 2015
  • M.Phil., Mechanical Engineering, Hong Kong University of Science & Technology, China, 2009
  • B.Sc., Physics, Hong Kong University of Science & Technology, China, 2006

LICENSES & CERTIFICATIONS

BSI ISO9001:2015 Lead Auditor Training Course, 2016

LANGUAGES

  • Chinese