Classical Analog of Electromagnetically Induced Transparency in the Visible Range With Ultra-Compact Plasmonic Micro-Ring Resonators

Abstract

We theoretically show that it should be possible to demonstrate Electromagnetic-Induced-Transparency-like (EITlike) effects in the visible range by using ultra-compact plasmonic micro-ring resonators with μm 2 order foot print. By using the finite-difference time-domain (FDTD) numerical method and the coupled mode theory (CMT) collaboratively, the transmission intensity, phase, and group delay spectra of the coupled plasmonic ring resonators are theoretically calculated with the inclusion of metallic loss and dispersion through the Drude model. The interference induced transmission peak can be successfully achieved through suitable design of the plasmonic ring resonator structure.

Anomalous reflection from metasurfaces with gradient phase distribution below 2π

“…Because of the inherent properties of the metallic and tunable design, those optical properties (such as phase, amplitude, transmission, reflection, refraction, and absorption) resulting from the interaction between the incident electromagnetic wave and the metasurface can be controlled within a subwavelength spatial region. [8][9][10][11][12][13][14] Those optical properties can be varied by altering the geometry, material, and orientation of the constituent subwavelength structures. Hence, the metasurface-based structure can be regarded as a photonic device with a high ability of tunability to generate excellent optical functions.…”

Omnidirectional tunable terahertz analog of electromagnetically induced transparency realized by isotropic vanadium dioxide metasurfaces

“…[6][7][8] Recently, classical EIT based on the concept of MMs has been employed to mimic EIT behavior in both theory and experiment. [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] It usually includes a bright mode and a dark mode. Bright and dark modes generally have the same resonance frequencies, around which the bright mode can be directly excited by incident waves, while the dark mode does not couple directly to incident waves and can be excited by the local field of a bright mode through near-field coupling.…”