Low-Loss Magnetic Metamaterial Based on Analog of Electromagnetically Induced Transparency

Influence of symmetry breaking in a planar metamaterial on transparency effect and sensing application

“…This is because the antiparallel currents on the cut wires cause the destructive interference of the scattering EM fields, so that the radiation fields of wires I and II are greatly suppressed when the wire III exists. These striking features indicate that this metamaterial represents a promising candidate toward achieving the slow light, the biologic sensor and the low loss [19][20][21].…”

“…The EIT refers to the formation of a transmission window inside the absorption band of a three-level atomic media, in which two laser beams are resonantly coupled to two energy level transitions with different relaxation times [13]. Recently, a lot of attention has been paid to the fact that the EIT-like effect can occur in many classical oscillator systems [14][15][16][17][18][19][20][21][22]. Particularly, metamaterials are also configured to obtain the EIT-like effect.…”

“…Particularly, metamaterials are also configured to obtain the EIT-like effect. The metamaterial analogue of the EIT-like effect has been based on two main approaches: the "trapped mode" resonance in asymmetric structure [17] and the coupling between the bright and dark modes [16,19,21]. It is worth noting that the transparency effect (the trapped mode) in asymmetric metamaterial usually exhibits the sharply asymmetric spectrum profile, and this sharp spectrum is very sensitive to some disordering factors such as, variational geometry parameters, surrounding environments, and so on [23,24].…”

An Ultra-Low Loss Split Ring Resonator by Suppressing the Electric Dipole Moment Approach

“…So far, the electromagnetically induced transparency (EIT) effects have been introduced to the metamaterial designs for suppressing the radiation losses [27][28][29][30][31][32][33][34][35][36]. Although the losses of the EIT-like metamaterials are very low, they do not maintain the negativity in the real part of constitutive parameters [27,29,33,35]. Tsakmakidis et al have achieved the low loss and negative permeability metamaterial using the EIT-like effect, but its bandwidth is extremely narrow and this EIT-like structure is not convenient for fabrication due to involving to two different metals [37].…”

Magnetic metamaterial analog of electromagnetically induced transparency and absorption

“…However, most proposed magnetic EIT metamaterials are three dimensional and difficult to fabricate. 14,18,19 Moreover, the magnetic interaction is much weaker than the electric interaction, and thus it is more difficult to realize EIT effects in magnetic metamaterials.…”