Transmission control by asymmetric electromagnetically induced transparency-like metamaterials in transverse electromagnetic waveguide

Publication date: Available online 23 September 2019Source: Physics Letters AAuthor(s): Fulya Bagci, Baris AkaogluAbstractWe numerically and experimentally present passive and active electromagnetically induced transparency-like metamaterials in a TEM waveguide under normal excitation. Asymmetry of the metamaterial unit cell leads to the splitting of the radiative resonance. Surface current distributions are analyzed to account for each resonance. Moreover, by implementing a varactor diode to one of the gaps of the double-split ring resonator, electromagnetically induced transmission-like band is shifted in frequency and the corresponding bandwidth is modulated. A modulation ratio of 29.5 dB in transmission is experimentally demonstrated by only increasing the bias voltage 4 volts.

Source: Physics Letters A - September 24, 2019 Category: Physics Source Type: research