Experimental demonstration of polarization and direction insensitive metamaterial analog of electromagnetically induced transparency by bright-bright mode coupling

Bifunctional metasurface with ultra-broadband electromagnetically induced transparency and perfect transmissive polarization conversion

“…Then, the four corners of the metasurface are fixed with M3 double-pass hexagonal nylon column and nylon crosshead screw to form an air layer with a The experiment was completed using the free-space method with two standard gain horn antennas and a vector network analyzer Agilent-N5224A as shown in figure 13(a). The experiment was performed in a microwave chamber to minimize the effects of interference and noise; the distance between the test sample and the horn antenna was greater than 20λ to form a plane wave [44]. The horn antennas at the transmitting and receiving ends were placed horizontally to transmit and receive the electromagnetic wave, so that the coplanar polarization transmission coefficient (T yy ) of the electromagnetic wave could be measured (the EIT effect can be observed); then we kept the position of the two horn antennas unchanged, and only rotated the horn antenna at the receiving end by 90 • to receive the cross-polarization transmission coefficient (T yx ) of the electromagnetic wave.…”

An Active Electromagnetically Induced Transparency (EIT) Metamaterial Based on Conductive Coupling

“…In EIT effect, an absorptive resonance is coupled to a non-absorptive resonance, which results in a narrow transparent spectrum window and can realize a high Q-factor transmission peak. Although first reported in the quantum optics field, EIT effect was later demonstrated in other optical systems such as photonic crystals [ 3 ], resonator systems consisting of chiral optical states [ 4 ] and metamaterials [ 5 , 6 ]. Metamaterial is an artificially designed subwavelength unit cell array and used for manipulating electromagnetic waves.…”