一维液晶光子晶体在光滤波器、 低阈值激光器和光开关等领域有着很好的应用前景。 研究了一维液晶光子晶体的透射谱, 电压范围在0～10 V内, 光谱调谐范围约为50 nm, 透射峰半高宽为18 nm, 禁带宽度近400 nm。 进一步提出了非偏振光型液晶光子晶体, 设计了相互垂直0°扭曲取向的双液晶层一维液晶光子晶体器件。 双液晶层起到了对各向偏振光光程的补偿作用, 使得禁带中的两个透射峰合并为一个透射峰, 加强了光强度, 增强了滤波性能。

One-dimensional (1-D) photonic crystals(PCs)with liquid crystals (LCs) are promising in various applications such as filters, low-threshold lasers, optical switch. In the present paper, the authors investigated the transmission spectrum of 1-D PCs with LCs for defect layer at different voltages ranging from 0 to 10 V. The tunable spectral range was about 50 nm, FWHM of the transmission peak was 18 nm and the band gap was nearly 400 nm. Furthermore, we presented a kind of polarization insensitive LC photonic crystal, and designed a 1-D LC photonic crystal device that has double LC layers with zero twisted angle. Double LC layers have a function of compensation for both polarization components of incident light, which makes the original two transmission peaks in the band gap to incorporate to one, and enhances the light intensity and filter performance.