Radiation absorption in metal-insulator-metal (MIM) metasurfaces, which generally consist of a metal back-plate, dielectric layer, and a metal nano-structure, is currently applied for realizing a great variety of efficient photo-thermal energy converter designs . Such converters also show significant promise in the mid-infrared (IR) wavelength range, where they are used as both IR radiation sources as well as detectors, notably for applications in optical sensing of volatile organic compounds (VOCs) . Also, owing to their spectrally selective emissivity, metasurfaces can be harnessed as passive yet efficient radiative coolers at specific atmospheric IR transmission windows.