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Proceedings Paper

Channel Bragg-plasmon coupled waveguide
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Paper Abstract

We present a detailed analysis and recipe for designing a channel Bragg-plasmon coupled waveguide where the intermodal coupling between a bandgap-guided mode and surface plasmon mode substantially modifies the phase-velocity dispersion slope of supermodes. This leads to appreciably large group-velocity-dispersion with peak value of ≈4.33x104 ps/km-nm close to the optical communication band as well as interaction bandwidth of about 765 pm for 1 cm long waveguide. We also found that bandgap guided Bragg modes exhibit stronger dispersive features than the plasmon modes around ~ 1.50 μm which is exactly opposite to what is usually observed in visible region. The impact of waveguide parameters such as channel width etc. on mode-coupling mechanism is also studied with significant emphasis on the propagation loss suffered by the supermodes of the structure.

Paper Details

Date Published: 23 August 2011
PDF: 6 pages
Proc. SPIE 8173, Photonics 2010: Tenth International Conference on Fiber Optics and Photonics, 81731I (23 August 2011); doi: 10.1117/12.897719
Show Author Affiliations
Ritwick Das, National Institute of Science Education and Research (India)
Rajan Jha, Indian Institute of Technology Bhubaneswar (India)
Triranjita Srivastava, Indian Institute of Technology Delhi (India)

Published in SPIE Proceedings Vol. 8173:
Photonics 2010: Tenth International Conference on Fiber Optics and Photonics
Sunil K. Khijwania; Banshi D. Gupta; Bishnu P. Pal; Anurag Sharma, Editor(s)

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