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Chin. Phys. B, 2013, Vol. 22(4): 047808    DOI: 10.1088/1674-1056/22/4/047808
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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

M Afshari Bavil, Sun Xiu-Dong (孙秀冬)
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      Revised:  04 August 2012      Accepted manuscript online: 
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:  xdsun@hit.edu.cn

Cite this article: 

M Afshari Bavil, Sun Xiu-Dong (孙秀冬) 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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