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Proceedings Article

Nanoscale plasmonic waveguides for filtering and demultiplexing devices

[+] Author Affiliations
A. Akjouj, A. Noual, Y. Pennec, B. Bjafari-Rouhani

Institut d'Electronique, de Microélectronique, et de Nanotechnologie, CNRS, Univ. de Lille 1 (France)

Proc. SPIE 7712, Nanophotonics III, 771231 (May 10, 2010); doi:10.1117/12.854733
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From Conference Volume 7712

  • Nanophotonics III
  • David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf
  • Brussels, Belgium | April 12, 2010

abstract

Numerical simulations, based on a FDTD (finite-difference-time-domain) method, of infrared light propagation for add/drop filtering in two-dimensional (2D) Ag-SiO2-Ag resonators are reported to design 2D Y-bent plasmonic waveguides with possible applications in telecommunication WDM (wavelength demultiplexing). First, we study optical transmission and reflection of a nanoscale SiO2 waveguide coupled to a nanocavity of the same insulator located either inside or on the side of a linear waveguide sandwiched between Ag. According to the inside or outside positioning of the nanocavity with respect to the waveguide, the transmission spectrum displays peaks or dips, respectively, which occur at the same central frequency. A fundamental study of the possible cavity modes in the near-infrared frequency band is also given. These filtering properties are then exploited to propose a nanoscale demultiplexer based on a Y-shaped plasmonic waveguide for separation of two different wavelengths, in selection or rejection, from an input broadband signal around 1550 nm. We detail coupling of the 2D add/drop Y connector to two cavities inserted on each of its branches.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

A. Akjouj ; A. Noual ; Y. Pennec and B. Bjafari-Rouhani
"Nanoscale plasmonic waveguides for filtering and demultiplexing devices", Proc. SPIE 7712, Nanophotonics III, 771231 (May 10, 2010); doi:10.1117/12.854733; http://dx.doi.org/10.1117/12.854733


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