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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 29, Iss. 14 — Jul. 15, 2011
  • pp: 2116–2125

Evolution of Highly Confined Surface Plasmon Modes in Terahertz Quantum Cascade Laser Waveguides

Huda Tanvir, B. M. A. Rahman, N. Kejalakshmy, A. Agrawal, and K. T. V. Grattan

Journal of Lightwave Technology, Vol. 29, Issue 14, pp. 2116-2125 (2011)


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Abstract

The evolution of surface plasmon (SP) supermodes through the effective coupling of isolated SP modes in a semiinsulating quantum cascade laser (QCL) waveguide is thoroughly discussed here. The effect of varying the material and geometric parameters of GaSb/AlGaSb QCL operating at 3.0 THz are thoroughly studied using a full-vectorial finite-element method. It was observed that this structure is prone to mode degeneration caused by resonant interaction of the lasing mode with a higher order plasmon mode. An optimized design is also proposed to suppress such adverse affects and highly divergent field profiles arising from the generation of higher order lateral modes.

© 2011 IEEE

Citation
Huda Tanvir, B. M. A. Rahman, N. Kejalakshmy, A. Agrawal, and K. T. V. Grattan, "Evolution of Highly Confined Surface Plasmon Modes in Terahertz Quantum Cascade Laser Waveguides," J. Lightwave Technol. 29, 2116-2125 (2011)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-29-14-2116

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