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Open AccessArticle

Multi-Wavelength Filters of Templated Blue Phase Liquid Crystal

National Engineering Lab for TFT-LCD Materials and Technologies, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Crystals 2019, 9(9), 451; https://doi.org/10.3390/cryst9090451
Received: 10 July 2019 / Revised: 8 August 2019 / Accepted: 28 August 2019 / Published: 30 August 2019
(This article belongs to the Special Issue Liquid Crystal Optics and Physics: Recent Advances and Prospects)
The multi-wavelength filters in the visible light band using the blue phase liquid crystal (BPLC) template was investigated. A multi-layer templated BPLC (T-BPLC) filter without intermediate dielectric layers was fabricated, which may reflect multi-wavelength in one filter. Compared with the cholesteric liquid crystal (CLC) filter, the T-BPLC filter may get a much narrower reflection bandwidth (<15 nm), show better angular stability of incident light, and have a more stable wavelength and bandwidth with a temperature shift. Furthermore, the central wavelength and bandwidth can be easily controlled by the fabrication process and the optimization of the material concentration. When the incident angle varies, the shift of the center wavelength of the T-BPLC filter is much smaller than that of the CLC filter. The multi-wavelength filter shows a potential application in color filters and high-density wavelength division multiplexed networks. View Full-Text
Keywords: blue phase liquid crystal; filters; polymer template; reflection bandwidth blue phase liquid crystal; filters; polymer template; reflection bandwidth
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MDPI and ACS Style

Zha, S.; Zhang, H.; Sun, C.; Feng, Y.; Lu, J. Multi-Wavelength Filters of Templated Blue Phase Liquid Crystal. Crystals 2019, 9, 451.

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