title: Formation and evolution mechanisms of plasmon-induced transparency in MDM waveguide with two stub resonators.
abstract: We demonstrate the realization of plasmonic analog of electromagnetically induced transparency (EIT) in a system composing of two stub resonators side-coupled to metal-dielectric-metal (MDM) waveguide. Based on the coupled mode theory (CMT) and Fabry-Perot (FP) model, respectively, the formation and evolution mechanisms of plasmon-induced transparency by direct and indirect couplings are exactly analyzed. For the direct coupling between the two stub resonators, the FWHM and group index of transparent window to the inter-space are more sensitive than to the width of one cut, and the high group index of up to 60 can be achieved. For the indirect coupling, the formation of transparency window is determined by the resonance detuning, but the evolution of transparency is mainly attributed to the change of coupling distance. The consistence between the analytical solution and finite-difference time-domain (FDTD) simulations verifies the feasibility of the plasmon-induced transparency system. It is also interesting to notice that the scheme is easy to be fabricated and may pave the way to highly integrated optical circuits.
authors.affiliation: College of Physics and Electronics, Central South University, Changsha 410083, China.
authors.forename: Guangtao
authors.initials: G
authors.lastname: Cao
authors.forename: Hongjian
authors.initials: H
authors.lastname: Li
authors.forename: Shiping
authors.initials: S
authors.lastname: Zhan
authors.forename: Haiqing
authors.initials: H
authors.lastname: Xu
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Liu
authors.forename: Zhihui
authors.initials: Z
authors.lastname: He
authors.forename: Yun
authors.initials: Y
authors.lastname: Wang
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D008027:Light; D008962:Models, Theoretical; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D014159:Transducers