Studies of electromagnetically induced transparency in metamaterials

Abstract

We have studied electromagnetically induced transparency (EIT) in metamaterials for various schemes corresponding to those in an atomic medium. We numerically calculate a symmetric dolmen scheme of metamaterials corresponding to a tripod model of EIT-based optical switching and illustrate plasmonic double dark resonances. Our study provides a fundamental understanding and useful guidelines in using metamaterials for plasmonic-based all-optical information processing.

Plasmon-Induced Transparency in Coupled Graphene Gratings

“…[8], reflection spectra, which are complementary to the transmission spectra, are presented.) Another type of coupled resonance scheme has been widely studied; this scheme is based on plasmonic resonances and thus is referred to as plasmon-induced transparency (PIT) [9][10][11][12][13][14][15][16][17][18][19][20][21][22]. PIT has attracted significant attention owing to the strong field confinement and compactness of plasmonic resonance structures.…”

“…PIT has attracted significant attention owing to the strong field confinement and compactness of plasmonic resonance structures. The PIT schemes proposed up to date has been categorized into two types: (1) those based on the direct destructive interference between a dark mode and a radiative mode [9][10][11][12][13][14][15][16][17][18][19] and (2) those based on the coupling through a wave propagation channel [20][21][22]. The latter is referred to as the phase-coupled PIT in Ref.…”

“…[8], will be hereafter simply referred to as the direct-coupled PIT. To the best of our knowledge, all existing research on the directcoupled PIT was based on the concept of metamaterials [9][10][11][12][13][14][15][16][17][18][19]. By contrast, only waveguide-type structures have been considered for the phase-coupled PIT [20][21][22].…”

Electromagnetically Induced Absorption in Metamaterials in the Infrared Frequency

“…DISCUSSION Figure 7 shows the transmission spectra of the EIT and EIA structures as a function of the symmetry parameter s, we see that the narrow transmission/absorption window becomes more pronounced and shifted to lower frequencies for the EIA structure as the s parameter increases. For s = 0 the EIT and EIA disappear as breaking symmetry is a requirement for both the EIT and EIA effect [8][9][10][11][12][13][14].…”

“…A bright mode element couples strongly with the incident excitation field while the dark element does not couple with the incident field but couples with the magnetic field induced by the bright element. Several EIT metamaterial structures have been employed and reported in the microwave, terahertz and optical frequency regions [8][9][10][11][12][13][14].…”