Chirality selective metamaterial absorber with dual bands

• DOI: 10.1364/oe.27.025983
• Publication Date: 2019-08-28T23:22:05Z
• Authors: Lili Wang; Xiaojun Huang; Minhua Li; Jianfeng Dong
• Keywords: Chirality; Ray

In this paper, a sensitive chirality selective metamaterial absorber (CSMA) is constructed by using 'I-shaped' resonator with asymmetric twisted metallic wires. Absorption of 95.18% and 91.77% at two resonant frequencies can be achieved for left-handed circularly polarized (LCP) incident wave, little loss right-handed (RCP) which results in significant absorptive circular dichroism. Not only the CSMA intensely absorb LCP illumination dual bands, but also (CP) conversion RCP wave over broad bandwidth. The spin-dependent absorption, closely linked to chiral symmetry breaking, investigated through oblique incidence, power distribution scanning parameters optimization. proposed strategy further demonstrated mid-infrared band could advance applications polarization manipulation detectors/lasers, sensing/bolometers, molecular spectroscopy.