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Tunable two-dimensional photonic crystal couplers made of dielectric elastomer inclusions

机译：由介电弹性体夹杂物制成的可调谐二维光子晶体耦合器

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摘要

We propose a tunable directional coupler based on a two-dimensional photonic crystal made of dielectric elastomer rods embedded in air background. In the interaction region, the inclusions are a dielectric elastomer cylindrical actuator made of a hollow cylinder sandwiched between two compliant electrodes. By applying a voltage between the compliant electrodes, the radial strain of the silicon-made actuator and the coupling characteristics of the photonic crystal coupler are investigated. The coupling length of the photonic crystal coupler depends on the voltage applied between the electrodes, which is analyzed by the plane wave expansion method. Due to the radial strain of the dielectric elastomer under external voltage, the tunable photonic crystal coupler is realized. Numerical simulations obtained by the finite-difference time-domain method confirmed the feasibility of the tunable photonic crystal coupler.
机译：我们提出了一种基于二维光子晶体的可调定向耦合器，该二维光子晶体由嵌入空气背景的介电弹性体棒制成。在相互作用区域中，夹杂物是由空心圆柱体制成的介电弹性体圆柱体致动器，该圆柱体夹在两个柔性电极之间。通过在顺从电极之间施加电压，研究了硅制致动器的径向应变和光子晶体耦合器的耦合特性。光子晶体耦合器的耦合长度取决于施加在电极之间的电压，该电压通过平面波扩展方法进行分析。由于介电弹性体在外部电压下的径向应变，因此实现了可调光子晶体耦合器。通过时域有限差分法获得的数值模拟结果证实了可调光子晶体耦合器的可行性。

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