Metasurface converts sunlight to heat for electron emission

Researchers from the Universities of Bristol and Exeter have created a metasurface that strongly absorbs light across the solar spectrum but minimises emission of thermal radiation. It uses uses amorphous carbon as an inter-layer between thin gold films with the upper film patterned with a 2D periodic array using focused ion beam etching. Gold is a first step, ...
Metasurface converts sunlight to heat for electron emission