Wang Hsiao-Tsung, Timofeev Ivan V, Chang Kai, Zyryanov Victor Ya, Lee Wei
Opt Express. 2014 Jun 16;22(12):15097-103. doi: 10.1364/OE.22.015097.
A one-dimensional asymmetric photonic crystal with dual-frequency liquid crystal as a central defect layer was demonstrated. Such asymmetric structure was characterized by the dramatic increase in intensity of the electric field of light localized at the overlapped photonic bandgap edges, thereby enhancing the observed transmittance of the spectral windows originating from the defect layer. The defect layer was made of a dual-mode liquid crystal that exhibited not only electrical tunability and switchability but also optical bistability. Consequently, tunable and bistable defect modes can be realized in the photonic structure. This asymmetric photonic crystal structure is promising and should be further explored for photonic device applications.
展示了一种以双频液晶作为中心缺陷层的一维非对称光子晶体。这种非对称结构的特征在于，位于重叠光子带隙边缘处的光电场强度急剧增加，从而提高了源自缺陷层的光谱窗口的观测透射率。缺陷层由一种双模液晶制成，该液晶不仅具有电学可调性和可切换性，还具有光学双稳性。因此，在光子结构中可以实现可调谐和双稳缺陷模式。这种非对称光子晶体结构很有前景，应进一步探索其在光子器件应用方面的潜力。
