Tunable light propagation in photonic Crystal coupler filled with liquid Crystal
Tunable light propagation in photonic Crystal coupler filled with liquid Crystal
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DOI：
10.1109/lpt.2004.837723
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发表时间：
2005
影响因子：
2.6
通讯作者：
T. Yasuda;Yasuhide Tsuji;M. Koshiba
中科院分区：
文献类型：
--
作者：
T. Yasuda;Yasuhide Tsuji;M. Koshiba
提出了一种新的光子晶体耦合器型光开关，它由一个三角形晶格的空气孔填充液晶（LC）。该开关利用去耦特性。为了利用LC的大折射率变化，与包层区域相比，/spl pi/相移较大的空气孔被引入到纤芯区域中。在我们的结构中，所有的空气孔填充LC和LC的选择性注入是不需要的。通过改变外加磁场的方向，使耦合状态由完全耦合变为解耦，从而实现开关操作。本开关的开关操作通过二维有限元法（FEM）确认，并且初步的三维计算也确认二维FEM结果。
We propose a new photonic crystal coupler-type optical switch which consists of a triangular lattice of air holes filled with liquid crystal (LC). This switch utilizes the decoupling nature. In order to utilize a large refractive index change of LC, /spl pi/ phase-shifted larger air holes are introduced into the core region, compared to the cladding region. In our structure, all air holes are filled with LC and selective injection of LC is not required. By changing the orientation of the applied field, the coupling state changes decoupling from perfect coupling, and switching operation is realized. Switching operation of the present switch is confirmed by the two-dimensional finite-element method (FEM), and also preliminary three-dimensional calculations confirm the two-dimensional FEM results.