Mohammadimasoudi Mohammad, Beeckman Jeroen, Shin Jungsoon, Lee Keechang, Neyts Kristiaan
Opt Express. 2014 Aug 11;22(16):19098-107. doi: 10.1364/OE.22.019098.
A wavelength shift of the photonic band gap of 141 nm is obtained by electric switching of a partly polymerized chiral liquid crystal. The devices feature high reflectivity in the photonic band gap without any noticeable degradation or disruption and have response times of 50 µs and 20 µs for switching on and off. The device consists of a mixture of photo-polymerizable liquid crystal, non-reactive nematic liquid crystal and a chiral dopant that has been polymerized with UV light. We investigate the influence of the amplitude of the applied voltage on the width and the depth of the reflection band.
通过对部分聚合的手性液晶进行电切换，获得了141纳米的光子带隙波长偏移。这些器件在光子带隙中具有高反射率，且无明显降解或破坏，开关响应时间分别为50微秒和20微秒。该器件由可光聚合液晶、非反应性向列液晶和一种已通过紫外光聚合的手性掺杂剂的混合物组成。我们研究了施加电压的幅度对反射带宽度和深度的影响。
