Investigation of coupling length in a semi-cylindrical surface plasmonic coupler |
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| Authors: | Pouya Dastmalchi Nosrat Granpayeh Majid Rasouli Disfani |
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| Affiliation: | (1) EHF Key Laboratory of Fundamental Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China;(2) National Key Laboratory of Monolithic Integrated Circuits and Modules, Nanjing, 210000, China |
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| Abstract: | We have investigated the performance of a nano-optical directional coupler based on gap plasmon waveguides. The coupler consists of two waveguides having a localized coupled plasmon propagating between two semi-cylindrical surfaces. After introducing a fundamental mode of studied waveguides, effects of the structure parameters on the coupling length are shown. Simulation results of the coupler obtained by the compact-2D finite-difference time-domain (FDTD) method comply with those derived by an analytic method with the aid of the finite-element frequency-domain (FEFD) software package of COMSOL. |
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