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  • Title: Plasmonic coupled-cavity system for enhancement of surface plasmon localization in plasmonic detectors.
    Author: Ooi KJ, Bai P, Gu MX, Ang LK.
    Journal: Nanotechnology; 2012 Jul 11; 23(27):275201. PubMed ID: 22706495.
    Abstract:
    A plasmonic coupled-cavity system, which consists of a quarter-wave coupler cavity, a resonant Fabry-Pérot detector nanocavity, and an off-resonant reflector cavity, is used to enhance the localization of surface plasmons in a plasmonic detector. The coupler cavity is designed based on transmission line theory and wavelength scaling rules in the optical regime, while the reflector cavity is derived from off-resonant resonator structures to attenuate transmission of plasmonic waves. We observed strong coupling of the cavities in simulation results, with an 86% improvement of surface plasmon localization achieved. The plasmonic coupled-cavity system may find useful applications in areas of nanoscale photodetectors, sensors, and an assortment of plasmonic-circuit devices.
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