Abstract
We present a detailed study on waveguide design principle and propagation features of a
channel Bragg-surface plasmon-coupled-waveguide (BSPCW). After proposing a convenient design
route, we analyze the mechanism of coupling between bandgap-guided modes and surface plasmon
polariton modes with respect to change in waveguide parameters such as type of metal, metal
thickness and number of unit cells. In order to understand the physical mechanism behind the
mode-coupling, we observe the redistribution of modal power of the BSPCW as wavelength changes.
The interesting dispersion characteristics exhibited by the BSPCW supermodes opens a novel route
to realize accurate sensors and efficient dispersion compensating modules in signal processing.
Therefore, this comprehensive study could serve as a tool to optimize the performance of devices
dictated by the application requirements in sensor technology and optical communications. The
performance of the device in terms of sensing application is also being discussed.
© 2013 IEEE
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