Tunable structure of nanowire-grid polarizer for deep ultraviolet region

Ling, Jinzhong; Wang, Xiaorui; Liu, Xin; Xu, Yin

doi:10.1016/j.ijleo.2018.01.026

Cited by 4 publications

(1 citation statement)

References 19 publications

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“…Thus, the prospect of making large-sized WGP is limited. [16][17][18] Carbon nanotubes (CNTs) show anisotropic light absorption in a broad range owing to the 𝜋 plasmon-originated broad absorption spectrum, and hence they are expected to display strong anisotropic optical activity at both visible and UV wavelengths. [19,20] To use CNTs as a thin polarizing layer, the CNTs in the host matrix should have a high orientational ordering, a proper concentration, [21,22] and an optimized length [20,23] in order to maximize the dichroic ratio in anisotropic optical absorption.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin, Large‐Area, and Multifunctional Polarizer Based on Highly Ordered Carbon Nanotubes Produced by Simple Shear Flow

Jung,

Kim,

Kim

et al. 2023

Adv Materials Technologies

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Aligning carbon nanotubes (CNTs) with high orientational ordering in a 2D array is essential for realizing optical polarizers with high polarization efficiency over a wide spectral range. Two methods are reported: dispersing CNTs in a polymer matrix followed by stretching, and mechanical stretching of a vertically grown CNT forest and then transferring it onto a substrate. However, neither can realize nanometer‐thin or large polarizers. Herein, a novel approach is demonstrated to construct a large and thin (150 nm) conductive CNT polarizer by achieving liquid crystal (LC) phase of size‐controlled CNTs in chlorosulfonic acid, unidirectional shearing, and then drying. The polarizer exhibits an excellent polarization efficiency of 98.4% for ultraviolet (365 nm) and 96.0% for visible light (550 nm). This performance is maintained even at 400 °C, while the conventional iodine‐type polarizer starts to lose efficiency over 100 °C. The CNT polarizer with high polarization efficiency for UV can replace the costly nano‐patterned wire‐grid polarizers currently used for photoaligning LCs and also its multifunction playing role of polarizer, electrode, and LC alignment is confirmed with switching of LC device. This study provides a new paradigm for realizing ultrathin and large CNT polarizers for broadband applications with outstanding heat resistance.

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Section: Introductionmentioning

confidence: 99%

Ultrathin, Large‐Area, and Multifunctional Polarizer Based on Highly Ordered Carbon Nanotubes Produced by Simple Shear Flow

Jung,

Kim,

Kim

et al. 2023

Adv Materials Technologies

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P‐154: New Carbon Nanotubes UV Polarizer for Photoalignment of Liquid Crystals

Shin

Won

Manda

et al. 2020

Symp Digest of Tech Papers

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We propose a unidirectionally aligned multi-layered carbon nanotubes (CNT) as a UV polarizer for LC photoalignment, which can replace wire-grid-polarizer (WGP) with high cost. A 12 multi-layered CNT polarizer exhibits the degree of polarization up to 91%. The fringe-field switching (FFS) LC device made by photoalignment with use of the proposed CNT polarizer exhibit uniform LC alignment in whole area and excellent electro-optics. The work proposes not only costeffective novel polarizer replacing WGP for photoalignment of LC but also for photonic component of broadband polarizer from UV to IR.

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