Application of Twisted Retarders to a Cholesteric Liquid Crystal Polarizer for the Control of Output Polarization States

Yoon, Ki‐Cheol; Yoon, Ho Cheol; Kim, Keun Young; Cui, Hao; Park, Jong Rak; Jang, Won; Park, O Ok

doi:10.1143/jjap.48.062201

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…As the eigenmodes propagate in the medium, the polarization axes will follow the twist of the local director, which is called waveguiding (or adiabatic following). TN-LCDs correspond to this situation [32]; 2.…”

Section: Twisted Lc With Lcpg Structurementioning

confidence: 97%

Twisting Structures in Liquid Crystal Polarization Gratings and Lenses

Zhang

Chen

et al. 2021

Crystals

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Recently, diverse twisting structures have been discovered to be a potential approach to design liquid crystal polarization gratings and lenses (LCPGs and LCPLs) with a high diffraction efficiency, broad bandwidth, wide view, and large diffraction angle. In this review, we divide these twisting structures into two main types, namely, multi-layer twisting structures with phase compensation and twisting structures forming Bragg diffraction. We found that multi-layer twisting structure LCPGs and LCPLs presented a broader bandwidth and a wider view angle by phase compensation. While for transmissive or reflective Bragg LCPGs, a large diffraction angle with high diffraction efficiency could be achieved. Based on the theoretical analysis in the review, potential research directions on novel twisting structures were prospected.

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Section: Twisted Lc With Lcpg Structurementioning

confidence: 97%

Twisting Structures in Liquid Crystal Polarization Gratings and Lenses

Zhang

Chen

et al. 2021

Crystals

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“…In a way, this is the essence of liquid crystal (LC) displays of all kinds, especially the twisted modes [13], which transform linear to near-linear polarizations. The attempts to use a single twisted LC layer [14,15] explicitly as a broadband (quarter-wave) retarder show some, but rather limited, achromatic behavior.…”

Section: Introductionmentioning

confidence: 99%

Multi-twist retarders: broadband retardation control using self-aligning reactive liquid crystal layers

Komanduri¹,

Lawler²,

Escuti³

2013

Opt. Express

135

100

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We report on a family of complex birefringent elements, called Multi-Twist Retarders (MTRs), which offer remarkably effective control of broadband polarization transformation. MTRs consist of two or more twisted liquid crystal (LC) layers on a single substrate and with a single alignment layer. Importantly, subsequent LC layers are aligned directly by prior layers, allowing simple fabrication, achieving automatic layer registration, and resulting in a monolithic film with a continuously varying optic axis. In this work, we employ a numerical design method and focus on achromatic quarter- and half-wave MTRs. In just two or three layers, these have bandwidths and general behavior that matches or exceeds all traditional approaches using multiple homogenous retarders. We validate the concept by fabricating several quarter-wave retarders using a commercial polymerizeable LC, and show excellent achromaticity across bandwidths of 450-650 nm and 400-800 nm. Due to their simple fabrication and many degrees of freedom, MTRs are especially well suited for patterned achromatic retarders, and can easily achieve large bandwidth and/or low-variation of retardation within visible through infrared wavelengths.

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Paper like cholesteric interferential mirror

Petriashvili¹,

Japaridze²,

Devadze³

et al. 2013

Opt. Express

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A new type of flexible cholesteric liquid crystal mirror is presented. The simple and effective method for the deposition of a cholesteric mixture on a paper substrate and the particular design of the device give a homogeneous alignment of the cholesteric texture providing mirrors with an intense and uniform light reflectance. A desired polarization state for the reflected light, linear or circular, can be easily obtained varying the thickness and optical anisotropy of the polymer cover film. By using non-azobenzene based photosensitive materials a permanent array of RGB mirrors with high reflectivity can be obtained on the same device. Paper like reflective mirrors are versatile and they can find applications in reflective displays, adaptive optics, UV detectors and dosimeters, information recording, medicine and IR converters.

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Application of Twisted Retarders to a Cholesteric Liquid Crystal Polarizer for the Control of Output Polarization States

Cited by 3 publications

References 6 publications

Twisting Structures in Liquid Crystal Polarization Gratings and Lenses

Twisting Structures in Liquid Crystal Polarization Gratings and Lenses

Multi-twist retarders: broadband retardation control using self-aligning reactive liquid crystal layers

Paper like cholesteric interferential mirror

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