@inproceedings{b33387145d5b4bde811a918959738484,
title = "Dual-frequency field assembly of over mm-thick cholesteric liquid crystals for advanced photonic applications",
abstract = "We report a room-temperature dual-frequency field assembly technique that is capable of fabricating large-areal size (~cm2 or larger), well-aligned cholesteric liquid crystals to thicknesses up to 2.2 mm, corresponding to period number N (thickness/index grating period) of nearly10,000 in the visible spectral regime. The method employs successive application of low- and high- frequency electric field on a thick cell of CLC starting mixture containing a nematic constituent of negative anisotropy. The low-frequency field creates conductive hydrodynamical instabilities that mash the mixture to a state with completely randomized orientation of the cholesteric helices; the next application of a high-frequency field at a field strength below the dielectric hydrodynamic instability reorient all the helices into uniform standing helices. Such extraordinarily thick chiral photonic crystals exhibit many never-before-realized chiral photonic properties such as giant rotation of optical polarization with high transmission (low scattering loss), polarization switching and ultrafast pulse modulation capabilities for visible to mid-infrared lasers, in addition to dynamic tunability by electrical, thermal, or optical means.",
author = "Khoo, {I. C.} and Chen, {J. W.} and Lin, {Tsung Hsien} and Feng, {Ting Mao}",
note = "Publisher Copyright: {\textcopyright} 2023 SPIE0277-786X ·; Liquid Crystals XXVII 2023 ; Conference date: 21-08-2023 Through 22-08-2023",
year = "2023",
doi = "10.1117/12.2678029",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Khoo, {Iam Choon}",
booktitle = "Liquid Crystals XXVII",
address = "United States",
}