A simple nanometeric plasmonic narrow-band filter structure based on metal-insulator-metal waveguide

  • Zhu J
  • Wang Q
  • Shum P
 et al. 
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In this paper, a novel nanometeric plasmonic narrow- band filter consisting of a metal-insulator-metal waveguide and a cavity embedded in the metal is proposed and numerically demon- strated by using the finite difference time domain method. The physical mechanism of the filter is elucidated. The results reveal that a narrow-band spectrum notch-filtering function can be real- ized with the proposed structure. The selection wavelength of the notch is proportional to the length of the cavity and inversely quasi- proportional to its width. The simple plasmonic filter structure has an ultracompact size with a length of a few hundred nanometers. Our results may open a way to construct nanoscale high-density photonic integration circuits based on plasmonic effects.

Author-supplied keywords

  • Integrated optics devices
  • metal-insulator-metal waveguide
  • surface plasmons
  • wavelength filtering

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  • Jia Hu Zhu

  • Qi Jie Wang

  • Ping Shum

  • Xu Guang Huang

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