Multiple plasmon-induced transparencies in coupled-resonator systems

Abstract

Multiple plasmon-induced transparencies are numerically predicted in an ultracompact plasmonic structure, comprising series of stub resonators side-coupled with a metal-isolator-metal waveguide. Because of the phase-coupled effect, electromagnetically induced transparency (EIT)-like spectral response occurs between two adjacent stub resonators with detuned resonant wavelengths. In this approach, multiple EIT-like spectral responses, with bandwidths of the order of several nanometers, are obtained in the plasmonic structure with a small footprint of about $0.6{\mathrm{\mu m}}^2$. An analytic model and the relative phase analysis based on the scattering matrix theory are used to explain this phenomenon.

© 2012 Optical Society of America

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