Multiple plasmon-induced transparencies in coupled-resonator systems

• DOI: 10.1364/ol.37.005133
• Publication Date: 2012-12-13T20:52:59Z
• Authors: Jianjun Chen; Chen Wang; Ru Zhang; Jinghua Xiao
• Keywords: 0103 physical sciences; 01 natural sciences

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 μm2. An analytic model and the relative phase analysis based on the scattering matrix theory are used to explain this phenomenon.