How does a cloud stay cool under direct sunlight––or seem to vanish in infrared? In nature, phenomena like white cumulus ...

Conventional white coatings (e.g., titanium dioxide, TiO₂ based) scatter sunlight diffusively, but are only effective in ...

A fully in-situ, optoelectronic mid-infrared filter using silicon metasurfaces and thermo-optic tunability can achieve ...