Broadband Polarization‐Insensitive Coherent Rasorber in Terahertz Metamaterial with Enhanced Anapole Response and Coupled Toroidal Dipole Modes

Enhanced anapole and coupled toroidal dipole moments sustaining the synthesized terahertz (THz) metamaterial innovatively promise for absorption‐transmission‐absorption (ATA) metamaterial rasorber (MMR). The anapole mode, due to the strong interaction of electric and magnetic dipole moments, and Fabry–Pérot resonance are supported by the dumbbell‐shaped apertures topologically distributed in a double‐layer silver plate, thus forming the...