Abstract

The transmission, reflection, and luminescence spectra of two types of samples of a cholesteric photonic crystal are measured: with the orientation of the n director specified by the surface of the optical cell, and when the n director is disoriented on the cell surface. In samples with surface orientation, a perfect helical structure is formed with characteristic features of the luminescence spectra in the photonic band gap due to the density of photonic states. The density of photonic states is restored. The lower threshold value of the surface-anchoring potential W is estimated when the director deviates from the orientation direction given by the surface. The transformation of the luminescence spectra and the temperature dependence of the position of the bands during the transition from surface-oriented structures to disordered ones are observed.

中文翻译：

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表面取向对液晶光子晶体光谱特性的影响

摘要

测量胆甾型光子晶体的两种类型样品的透射、反射和发光光谱：n指向矢的取向由光学单元表面指定，以及当n指向矢在单元表面上错位时。在具有表面取向的样品中，由于光子态的密度，在光子带隙中形成具有发光光谱特征的完美螺旋结构。恢复光子态的密度。表面锚定电位W的下阈值当导向器偏离表面给出的取向方向时估计。观察到在从表面取向结构向无序结构转变期间发光光谱的转变和带位置的温度依赖性。