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Your search keyword '"Jau, Hung-Chang"' showing total 38 results
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38 results on '"Jau, Hung-Chang"'

8. Electrotunable achromatic polarization rotator

Author

Guo, Duan-Yi, primary, Chang, Li-Min, additional, Chen, Chun-Wei, additional, Li, Cheng-Chang, additional, Jau, Hung-Chang, additional, Wang, Chun-Ta, additional, Kuo, Wen Sung, additional, and Lin, Tsung-Hsien, additional

Published
2021
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33. Gratings: Light-Driven Wide-Range Nonmechanical Beam Steering and Spectrum Scanning Based on a Self-Organized Liquid Crystal Grating Enabled by a Chiral Molecular Switch (Advanced Optical Materials 2/2015)

Author

Jau, Hung-Chang, primary, Li, Yannian, additional, Li, Cheng-Chang, additional, Chen, Chun-Wei, additional, Wang, Chun-Ta, additional, Bisoyi, Hari Krishna, additional, Lin, Tsung-Hsien, additional, Bunning, Timothy J., additional, and Li, Quan, additional

Published
2015
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36. Multi-stable variable optical attenuator based on a liquid crystal gel-filled photonic crystal fiber

Author

Lee, Chun-Hong, Wu, Chih-Wei, Chen, Chun-Wei, Jau, Hung-Chang, and Lin, Tsung-Hsien

Abstract

This work demonstrates a multi-stable variable optical attenuator (VOA) that is fabricated by infiltrating a photonic crystal fiber (PCF) with a liquid crystal (LC) gel. Varying the cooling rate or biasing the electric field during gelation yields various degrees of scattering. Therefore, LC gel-filled PCFs with various transmittances can be realized. At a wavelength of 1550 nm, an attenuation rate of −33.4  dB/cm is obtained at a cooling rate of 30°C/min and a biasing voltage of 400 V during gelation. The proposed all-in-fiber VOA exhibits tunable attenuation and multiple stable states at room temperature.

Published
2014

37. Bistable cholesteric liquid crystal light shutter with multielectrode driving

Author

Li, Cheng-Chang, Tseng, Heng-Yi, Pai, Tsung-Wei, Wu, Yu-Ching, Hsu, Wen-Hao, Jau, Hung-Chang, Chen, Chun-Wei, and Lin, Tsung-Hsien

Abstract

An electrically activated bistable light shutter that exploits polymer-stabilized cholesteric liquid crystal film was developed. Under double-sided three-terminal electrode driving, the device can be bistable and switched between focal conic and homeotropic textures with a uniform in-plane and vertical electrical field. The transparent state with a transmittance of 80% and the opaque/scattering state with a transmittance of 13% can be realized without any optical compensation film, and each can be simply switched to the other by applying a pulse voltage. Also, gray-scale selection can be performed by varying the applied voltage. The designed energy-saving bistable light shutter can be utilized to preserve privacy and control illumination and the flow of energy.

Published
2014

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