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Opt Express. 2008 Oct 13;16(21):16314-25.

Characteristics of gap plasmon waveguide with stub structures.

Author information

  • 1Department of Optical Science and Technology, Faculty of Engineering, The University of Tokushima, Minamijosanjima 2-1, Tokushima 770-8506, Japan.

Abstract

We found that metal-dielectric-metal plasmon waveguides with a stub structure, i.e. a branch of the waveguide with a finite length, can function as wavelength selective filters of a submicron size. It was found that the transmission characteristics of such structures depend on the phase relationship between the plasmon wave passing through the stub and the one returning to the waveguide from the stub. We also propose structures with a lossless 90 degrees bend in a plasmon waveguide, utilizing a stub structure. Furthermore, we present a functional stub structure, e.g., a 1:1 demultiplexer and a wavelength selective demultiplexer.

PMID:
18852737
[PubMed - indexed for MEDLINE]
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