Optical properties of broad stopband of a chiral smectic liquid crystal at highly oblique incidence
Optical properties of broad stopband of a chiral smectic liquid crystal at highly oblique incidence
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DOI：
10.7567/jjap.53.01ae01
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发表时间：
2013
影响因子：
1.5
通讯作者：
R. Ozaki;K. Kadowaki;H. Moritake
中科院分区：
文献类型：
--
作者：
R. Ozaki;K. Kadowaki;H. Moritake
从实验和理论上研究了手性近晶C相铁电液晶的阻带光学特性。手性近晶和手性液晶被认为是赝光子晶体。它们表现出布拉格反射对应的半和全间距带。在数值计算的基础上，讨论了斜入射布拉格反射的特性。在大斜入射时，FLC的全音带变得更深更宽。利用这一特性，我们证明了一个FLC阻带与独立可调的波长和带宽，通过控制温度和入射角，分别。
The optical properties of stopbands of a ferroelectric liquid crystal (FLC) in a chiral smectic C phase are investigated experimentally and theoretically. Chiral smectic and cholesteric liquid crystals are regarded as pseudo photonic crystals. They exhibit Bragg reflections corresponding to half- and full-pitch bands. The characteristics of the Bragg reflections at oblique incidence are discussed on the basis of numerical calculations. The full-pitch band of an FLC becomes deeper and wider at highly oblique incidence. Using this characteristic, we demonstrated an FLC stopband with independently tunable wavelength and bandwidth by controlling the temperature and incident angle, respectively.