By using metasurfaces made up of arrays of F-shaped nanostructures with various symmetries, researchers are able to generate circular polarised thermal radiation in a controlled and efficient manner.

"Spinning" thermal radiation unlocks new machine vision light source

The radiation could enable new mid-infrared light sources for optical gas sensing and infrared imaging

Image: atdigit/

Quantum leap for SWIR imaging

There’s a renaissance underway in shortwave infrared imaging as thin-film photodetectors come online. Tim Hayes reports


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