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Chin. Phys. B, 2013, Vol. 22(4): 047808    DOI: 10.1088/1674-1056/22/4/047808

A compact frequency selective stop-band splitter by using Fabry–Perot nanocavity in a T-shape waveguide

M Afshari Bavil, Sun Xiu-Dong
Department of Physics, Harbin Institute of Technology, Harbin 150001, China
Abstract  By utlizing Fabry-Perot (FP) nanocavity adjacent to T-shape gap waveguide ports, spectrally selective filtering is realized. When the wavelength of incident light corresponds to the resonance wavelength of the FP nanocavity, the surface plasmons are captured inside the nanocavity, and light is highly reflected from this port. The resonance wavelength is determined by using Fabry–Perot resonance condition for the nanocavity. For any desired filtering frequency the dimension of nanocavity can be tailored. The numerical results are based on the two-dimensional finite difference time domain simulation under a perfectly matched layer absorbing boundary condition. The analytical and simulation results indicate that the proposed structure can be utilized for filtering and splitting applications.
Keywords:  T-shape splitter      Fabry–Perot nanocavity      spectrally selective splitting      finite difference time domain (FDTD) simulation     
Received:  02 July 2012      Published:  01 March 2013
PACS:  78.68.+m (Optical properties of surfaces)  
  68.47.De (Metallic surfaces)  
  42.79.Fm (Reflectors, beam splitters, and deflectors)  
Fund: Project supported by the National Key Basic Research Program of China (Grant No. 2013CB328702).
Corresponding Authors:  Sun Xiu-Dong     E-mail:

Cite this article: 

M Afshari Bavil, Sun Xiu-Dong A compact frequency selective stop-band splitter by using Fabry–Perot nanocavity in a T-shape waveguide 2013 Chin. Phys. B 22 047808

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