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, variПоказать полностьюous 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