High-temperature and abrasion-resistant metal-insulator-metal metamaterials

Selective solar absorbers (SSAs) with high performance are the key to concentrated power systems. Optical metamaterials emerging as a promising strategy enhance selective photon absorption, however, high-temperature stability (>500 °C) remains one of main challenges for practical applications. Here, multilayered metamaterial system (Al2O3/W/SiO2/W) based on metal-insulator-metal Fabry-Pérot resonance effect has been demonstrated absorptance over 92%, low thermal emittance loss below 6% (100 °C blackbody), and significant stability: it proved that optical 94% after 1-h annealing under ambient environment up 500 °C, 96-h cycle test at 400 °C. Outdoor tests demonstrate peak temperature rise (193.5 can be achieved unconcentrated irradiance surface abrasion resistance yields SSAs have robust attack engineering