We investigate the optical properties of the chiral smectic C phase of ferroelectric liquid crystals (FLCs) having a self-assembling helical structure that is regarded as a one-dimensional pseudo-photonic crystal. FLCs have several stop bands corresponding to full-pitch, half-pitch, and their high order bands under oblique incidence. It is expected that the center wavelength and bandwidth of the full-pitch band can be controlled by two different parameters: incident angle and electric field. By varying the incident angle and electric field, we have demonstrated independent control of the bandwidth and center wavelength of the full-pitch band.

中文翻译：

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通过改变入射角和电场控制铁电液晶阻带的波长和带宽

我们研究了具有自组装螺旋结构的铁电液晶（FLC）的手性近晶C相的光学性质，该结构被视为一维伪光子晶体。FLC具有几个斜带，分别对应于全音高，半音高及其高阶带。可以预期，可以通过两个不同的参数来控制全螺距频带的中心波长和带宽：入射角和电场。通过改变入射角和电场，我们证明了对全音调频带的带宽和中心波长的独立控制。