An Approximate Formula of the Effective Refractive Index of the Metal–Insulator–Metal Surface Plasmon Polariton Waveguide in the Infrared Region
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概要
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We present an approximate formula for the effective refractive index of the symmetric plasmonic mode of the metal–insulator–metal waveguide in the infrared region. It is shown that, in the long-wavelength region, the effective refractive index asymptotes to a wavelength-independent constant value. The proposed formula that gives this constant value is in good agreement with that obtained by solving the rigorous transcendental characteristic equation. We believe that this formula can be used to analyze and design lots of plasmonic-waveguide-based devices.
- 2008-11-25
著者
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Lee Byoungho
National Creative Research Center for Active Plasmonics Application Systems, Inter-University Semiconductor Research Center and School of Electrical Engineering, Seoul National University, Gwanak-gu, Sillim-dong, Seoul 151-774, Korea
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Park Junghyun
National Creative Research Center for Active Plasmonics Application Systems, Inter-University Semiconductor Research Center and School of Electrical Engineering, Seoul National University, Gwanak-gu, Sillim-dong, Seoul 151-774, Korea
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- An Approximate Formula of the Effective Refractive Index of the Metal–Insulator–Metal Surface Plasmon Polariton Waveguide in the Infrared Region
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