Ultra-wideband, wide-angle reconfigurable metasurface absorbers

We present the design and characterization of a novel metasurface absorber utilizing the phase change material, vanadium dioxide (VO2). The absorber demonstrates ultra-wideband performance, exhibiting high absorption across a broad spectrum ranging from 400 nm to 1200 nm. In addition to its spectral versatility, the absorber is designed to function effectively over a wide range of incident angles, maintaining an average absorption of approximately 80% for angles between 0 and 65 degrees. A unique feature of this absorber is its reconfigurability in the infrared regime, particularly in the 1400-1600 nm range. This capability opens up new avenues for dynamic control and optimization of absorption properties in various applications.