Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.1364/OE.24.025019

Ключевые слова: Defects, Energy gap, Liquid crystals, Nematic liquid crystals, Photonic crystals, Spontaneous emission, Homeotropic nematic liquid crystals, Intensity modulators, Low-power consumption, Multi-channel filter, One dimensional photonic crystal, Photonic application, Photonic bandgap devices, Transmission characteristics, Light transmission

Аннотация: We report on the spectral properties of an optically switchable tristable chiral-tilted homeotropic nematic liquid crystal (LC) incorporated as a tunable defect layer in one-dimensional photonic crystal. By varying the polarization angle of the incident light and modulating the light intensity ratio between UV and green light, various transmission characteristics of the composite were obtained. The hybrid structure realizes photo-tunability in transmission of defect-mode peaks within the photonic bandgap in addition to optical switchability among three distinct sets of defect modes via photoinduced tristable state transitions. Because the fabrication process is easier and less critical in terms of cell parameters or sample preparation conditions and the LC layer itself possesses an extra stable state compared with the previously reported bistable counterpart operating on the basis of biased-voltage dual-frequency switching, it has much superior potential for photonic applications such as a low-power-consumption multichannel filter and an optically controllable intensity modulator. (C) 2016 Optical Society of America

Журнал: OPTICS EXPRESS

Выпуск журнала: Vol. 24, Is. 22

Номера страниц: 25019-25025

ISSN журнала: 10944087

Место издания: WASHINGTON

Издатель: OPTICAL SOC AMER

• Huang Kuan-Chung (Natl Chiao Tung Univ, Coll Photon, Tainan 71150, Taiwan)
• Hsiao Yu-Cheng (Natl Chiao Tung Univ, Coll Photon, Tainan 71150, Taiwan)
• Timofeev Ivan V. (Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia; Siberian Fed Univ, Lab Nonlinear Opt & Spect, Krasnoyarsk 660041, Russia)
• Zyryanov Victor Ya. (Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia)
• Lee Wei (Natl Chiao Tung Univ, Coll Photon, Tainan 71150, Taiwan)

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