Microsecond high‐contrast continuous 2.25π phase modulation based on non‐linear Kerr effect of vertically aligned deformed helix ferroelectric liquid crystal

Here we disclose a fast (ON time ∼50 μs and OFF time ∼25 μs at 55 °C), high‐contrast, continuous phase modulator without fringe field effect (FFE). The phase modulator uses the Kerr effect of vertically aligned deformed helix ferroelectric liquid crystals (VADHFLCs). Specifically, FFE is a long‐term...

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Veröffentlicht in:Journal of the Society for Information Display Jg. 30; H. 5; S. 404 - 412
Hauptverfasser: Yuan, Zheng‐Nan, Sun, Zhi‐Bo, Yu, Xin‐Yi, Cheng, Ming, Cheng, Yue‐chu, Li, An‐ran, Vashchenko, Valerii, Kwok, Hoi‐Sing, Srivastava, Abhishek K.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Campbell Wiley Subscription Services, Inc 01.05.2022
Schlagworte:
Adaptive optics
Augmented reality
continuous 2π phase modulation
defect‐free deformed helix ferroelectric liquid crystal
Deformation effects
Ferroelectric materials
Ferroelectricity
Kerr effect
Kerr effects
Liquid crystals
Nematic crystals
Phase modulation
Virtual reality
ISSN:1071-0922, 1938-3657
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Zusammenfassung:Here we disclose a fast (ON time ∼50 μs and OFF time ∼25 μs at 55 °C), high‐contrast, continuous phase modulator without fringe field effect (FFE). The phase modulator uses the Kerr effect of vertically aligned deformed helix ferroelectric liquid crystals (VADHFLCs). Specifically, FFE is a long‐term problem for nematic liquid crystals (NLCs). In this article, we are disclosing, for the first‐time found, that no FFE exists for VADHFLCs, even for phase modulator with 1‐μm pixel pitch. It is an attractive feature for ultra‐high‐resolution display and photonic applications. Moreover, the Kerr constant is 88 nm/V2, and the contrast ratio is larger than 1000:1. It is a promising candidate for high‐PPI augmented reality (AR)/virtual reality (VR) displays, wavelength selective switch (WSS), hologram, adaptive optics, and LiDARs. Here we disclose a fast (ON+OFF = 50 μs + 25 μs at 55°C), high‐contrast, continuous phase modulator without fringe‐field‐effect (FFE) based on the Kerr effect of vertical aligned deformed helix ferroelectric liquid crystals (VADHFLC). No FFE exists, even for 1μm pixel pitch, which solves the long‐term problems in NLCs. It shows Kerr constant 88 nm/V2, and contrast ratio 1000:1.
Bibliographie:Funding information
Innovations and Technology Commission of Hong Kong, Grant/Award Number: PRP/049/19FX; The State Key Laboratory of Advanced Displays and Optoelectronics
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ISSN:1071-0922
1938-3657
DOI:10.1002/jsid.1123