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Liquid Crystal-Based Dielectric-Loaded Plasmonic Ring Resonator Filter

机译:液晶基介电等离子体环谐振滤波器

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摘要

A new tunable plasmonic filter based on liquid crystal dielectric loaded plasmonic waveguide is proposed and studied. The transmission spectrum can be controlled easily by applying a constant external electric field to the plasmonic filter. The physical principle of this phenomenon is evaluated from the phase of surface plasmon polaritons (SPPs) in the waveguide and the electro-optical effect of liquid crystals. Our numerical simulations with finite-difference time-domain (FDTD) technique reveal that a large tuning range of the transmission spectrum can be achieved. Both the electrical switching and optical properties of the proposed structure are investigated in the context of designing an optical switch. The special feature of the proposed structure gives it an opportunity to be used as an efficient element in ultrahigh nano-scale integrated photonic circuits for miniaturization and tuning purposes.
机译:提出并研究了一种基于液晶介质加载等离子体波导管的新型可调谐等离子体波滤波器。通过向等离子滤波器施加恒定的外部电场,可以轻松控制透射光谱。从波导中的表面等离激元极化子(SPPs)的相位和液晶的电光效应可以评估这种现象的物理原理。我们使用时域有限差分(FDTD)技术进行的数值模拟表明,可以实现较大的传输频谱调谐范围。在设计光开关的背景下,研究了所提出结构的电开关和光学特性。所提出结构的特殊特征使其有机会在超高纳米级集成光子电路中用作高效元件,以实现微型化和调谐目的。

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