Design of a Polarization-Independent Dual-Band Electromagnetically Induced Transparency-Like Metamaterial

Abstract

In this study, the classical analog of single and dual-band electromagnetically induced transparency is demonstrated with a four-fold symmetric metamaterial consisting of a Minkowski fractal ring resonator surrounded by a square ring resonator. The proposed metamaterials show high transmission ratios at the polarization independent resonances, as confirmed by the applied two different numerical methods. Delay-bandwidth products are found to be 0.34 and 0.61 at the resonances of the dual-band metamaterial. The peak frequencies and transmission ratios maintain also for oblique angle of incidences. These features of the proposed metamaterials are promising for single and multi-band filtering applications as well as for slow light and sensing devices.

Polarization independent double-band electromagnetically induced transparency effect in terahertz metamaterials

“…In order to make practical devices applicable for ultrasensitive sensing and slow light effect, it is very crucial to design the double-band EIT MMs that have polarization independent response. Although polarization independent double-band EIT MM has been reported very recently in the gigahertz frequency regime [48], none of the studies on double-band EIT phenomenon in terahertz metamaterials have reported a polarization independent effect to the best of our knowledge. We have addressed this important aspect in this paper.…”

Dual-Tunable Polarization Insensitive Electromagnetically Induced Transparency in Metamaterials

“…14,15 The main advantage of metamaterials is that they are able to provide properties that are not possessed by conventional materials based on structural changes. 16 However, this can also be a disadvantage. This is because once a final structure is developed, results can no longer be tuned.…”

“…A single and dual-band EIT effect was investigated in a microwave metamaterial, which exhibited high transmission. 16 A polarization insensitive double-band EIT phenomenon is studied experimentally in the terahertz band. 10 These results can be applied in the fields on filters and sensors.…”

Independently tunable electromagnetically induced transparency effect and dispersion in a multi-band terahertz metamaterial

“…Quasi dark modes can couple with the incident electric field, however as compared to the bright mode it has weaker confinement. Several MM configurations have been exploited to exhibit multi-band EIT effect in the microwave 34,35 , infrared 36 as well as in the terahertz frequency regimes 37–39 . Zhang et al .…”