Toward Multispectral Imaging with Colloidal Metasurface Pixels

Multispectral colloidal metasurfaces are fabricated that exhibit greater than 85% absorption and approximate to 100 nm linewidths by patterning film-coupled nanocubes in pixels using a fusion of bottom-up and top-down fabrication techniques over wafer-scale areas. With this technique, the authors realize a multispectral pixel array consisting of six resonances between 580 and 1125 nm and reconstruct an RGB image with 9261 color combinations.