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arXiv · 1810.05491

Light Reconfigurable Geometric Phase Optical Element with Multi-stable States

Xiao-Qian Wang·Alwin Ming-Wai Tam·Wei-Qiang Yang·Engle Liao·Ka Chun Cheung·Wei Hu·Dong Shen·Vladimir Chigrinov·Hoi-Sing Kwok·Zhi-gang Zheng·Yanqing Lu·Quan Li
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Abstract

We present the design methodology of a light reconfigurable geometric phase optical element with multi-stable diffraction efficiency states, enabled by a photoresponsive self-organized chiral liquid crystal. Experimental demonstration shows the device exhibits a broad diffraction efficiency tunable range that can be smoothly modulated under alternate stimulation of ultraviolet and green lights. Distinctive to previous designs, the regulation of diffraction efficiency fundamentally stems from the modulation of geometric phase together with dynamical phase retardation, and any intermediate diffractive state is memorized. Such multi-stability facilitates applications including energy-saving all-optical signal processing in classical and quantum level, and phase hologram for anti-counterfeit.

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Xiao-Qian Wang, Alwin Ming-Wai Tam, Wei-Qiang Yang, Engle Liao, Ka Chun Cheung, Wei Hu, Dong Shen, Vladimir Chigrinov, Hoi-Sing Kwok, Zhi-gang Zheng, Yanqing Lu, Quan Li. 2018-10-12. Light Reconfigurable Geometric Phase Optical Element with Multi-stable States. https://arxiv.org/abs/1810.05491

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