Channel Bragg-plasmon coupled waveguide

Ritwick Das; Rajan Jha; Triranjita Srivastava

doi:10.1117/12.897719

23 August 2011 Channel Bragg-plasmon coupled waveguide

Ritwick Das, Rajan Jha, Triranjita Srivastava

Proceedings Volume 8173, Photonics 2010: Tenth International Conference on Fiber Optics and Photonics; 81731I (2011) https://doi.org/10.1117/12.897719
Event: International Conference on Fiber Optics and Photonics, 2010, Guwahati, India

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.

Citation Download Citation

Ritwick Das, Rajan Jha, and Triranjita Srivastava "Channel Bragg-plasmon coupled waveguide", Proc. SPIE 8173, Photonics 2010: Tenth International Conference on Fiber Optics and Photonics, 81731I (23 August 2011); https://doi.org/10.1117/12.897719

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