Electromagnetically induced transparency control in terahertz metasurfaces based on bright-bright mode coupling

Abstract

We demonstrate a classical analogue of electromagnetically induced transparency (EIT) in a highly flexible planar terahertz metamaterial (MM) comprised of three-gap split ring resonators. The keys to achieve EIT in this system are the frequency detuning and hybridization processes between two bright modes coexisting in the same unit cell as opposed to bright-dark modes. We present experimental verification of two-bright mode coupling for a terahertz EIT-MM in the context of numerical results and theoretical analysis based on a coupled Lorentz oscillator model. In addition, a hybrid variation of the EIT-MM is proposed and implemented numerically in order to dynamically tune the EIT window by incorporating photosensitive silicon pads in the split gap region of the resonators. As a result, this hybrid MM enables the potential active optical control of a transition from the on-state (EIT mode) to the off-state (dipole mode).

References in corpus (3)

• Coupling between a dark and a bright eigenmode in a terahertz metamaterial
• Terahertz metamaterials on free-standing highly-flexible polyimide substrates
• Polarization-dependent electromagnetic responses of ultrathin and highly flexible asymmetric terahertz metasurfaces

Cited by in corpus (10)

• High-Q transparency band in all-dielectric metasurfaces induced by a quasi bound state in the continuum
• Phase-controlled pathway interferences and switchable fast-slow light in a cavity-magnon polariton system
• Tunable High-Quality Fano Resonance in Coupled Terahertz Whispering-Gallery-Mode Resonators
• Tunable group delay in a doubly resonant metasurface composed of two dissimilar split-ring resonators
• Analogue of collectively induced transparency in metamaterials
• Resonance order-dependent plasmon-induced transparency in orthogonally-arranged nanoscale cavities
• Investigation of the characteristics of the dual-band electromagnetic induction transparent-like terahertz spectrum in a grating-like structure
• Dynamically configurable successively switchable multispectral plasmon induced transparency
• Some coordinate transformations relevant to refractive indices
• Coupled high-finesse optical Fabry-Perot microcavities