, Volume 6, Issue 1, pp 183–188

High Q Long-Range Surface Plasmon Polariton Modes in Sub-wavelength Metallic Microdisk Cavity


    • EECS DepartmentUniversity of Michigan
  • L. Jay Guo
    • EECS DepartmentUniversity of Michigan

DOI: 10.1007/s11468-010-9185-0

Cite this article as:
Chen, Y. & Guo, L.J. Plasmonics (2011) 6: 183. doi:10.1007/s11468-010-9185-0


Metal-capped microdisk cavity supporting surface plasmon polaritons (SPP)-guided whispering gallery mode (WGM) can achieve higher cavity factor Q than traditional microdisk cavity in sub-wavelength dimensions. We have numerically analyzed the limiting factors on Q using finite difference time domain method. The Q of SPP-guided WGM is primarily limited by the loss of metal. A thin metal-sandwiched microdisk cavity supporting long-range surface plasmon polariton mode was proposed to reduce the metal loss. The proposed cavities have been shown to increase cavity Q by more than 15-fold and reduce threshold gain by more than threefold as opposed to traditional microdisk cavities.


NanolaserSurface plasmon modeWhispering gallery modeSemiconductor laser cavity

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© Springer Science+Business Media, LLC 2010