H
Hoi Sing Kwok
Researcher at Hong Kong University of Science and Technology
Publications - 1207
Citations - 32982
Hoi Sing Kwok is an academic researcher from Hong Kong University of Science and Technology. The author has contributed to research in topics: Liquid crystal & Thin-film transistor. The author has an hindex of 77, co-authored 1165 publications receiving 29448 citations. Previous affiliations of Hoi Sing Kwok include University of Hong Kong & University of California, Berkeley.
Papers
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Journal ArticleDOI
Nano‐structured liquid‐crystal alignment layers (Invited Paper)
Hoi Sing Kwok,Fion Sze Yan Yeung +1 more
TL;DR: In this article, the alignment of liquid crystal by nano-structured surfaces is investigated and it is shown that reliable pretilt angles of any value between 0° and 90° can be produced with these surfaces.
Aligning Layers of Azo Dye Derivatives for Liquid Crystal Devices
Hirokazu Takada,Hidenari Akiyama,Haruyoshi Takatsu,Vladimir G. Chigrinov,Elena K. Prudnikova,Vladimir Kozenkov,Hoi Sing Kwok +6 more
Patent
Photo-induced dichroic polarizers and fabrication methods thereof
TL;DR: In this article, a method of forming a polarizing material comprising exposing a layer of dichroic material to activating light illumination to provide an ordered structure with a distinguished absorption axis and thus photo-induce polarization, and fixing the induced polarization by polymerisation of the dichroidic layer.
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Vertically Integrated Optical Sensor With Photoconductive Gain > 10 and Fill Factor > 70%
Xianda Zhou,Meng Zhang,Yitong Xu,Wei Zhou,Kai Wang,Arokia Nathan,Man Wong,Hoi Sing Kwok,Hai Ou,Jun Chen,Shaozhi Deng,Ningsheng Xu +11 more
TL;DR: In this paper, a hybrid active pixel optical sensor for high-resolution and high-sensitivity imaging is proposed and experimentally demonstrated, which vertically integrates an amorphous silicon p-i-n photodiode and a low-temperature polycrystalline silicon readout thin-film transistor (TFT).
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Y-Ba-Cu-O thin film infrared detectors
TL;DR: In this article, the Y-Ba-Cu-O thin film infrared detectors were fabricated and studied with a CO2 laser and operation of the detector in both the bolometric and non-bolometric modes was investigated.