Unidirectional manipulation of surface plasmon polariton by dual-nanocavity in a T-shaped waveguide |
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Authors: | Yongkang Gong Leiran Wang Yani Zhang |
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Institution: | State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China |
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Abstract: | A structure of two dimensional T-shaped metal-insulator-metal waveguide with dual-nanocavity is proposed. The two nanocavities located at each side of the slit on the lower metallic surface, act as band rejection filters and are capable of stopping the surface plasmon polaritons (SPPs) at the resonant wavelengths. The Fabry-Perot interferometry theory and the Finite-Difference-Time-Domain method are utilized to investigate the proposed waveguide. The numerical results demonstrate the realization of miniaturized photonic devices for effectively switching the SPPs propagation between the left and right waveguides in one direction. |
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Keywords: | Surface plasmon polaritons Integrated optics Waveguide |
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