Metasurface frequency upconversion capability/ inherent chirality produces circularly polarized light at specific frequency ranges

https://www.eurekalert.org/news-releases/1070865

"overcomes complex/ bulky optical setups hindering use in constraints space, using new metasurface... different response to left/ right light circular polarization... chirality/ rotational symmetry within nonlinear metasurface... selects/ amplifies specific circular polarization converting it into circularly polarized light at different frequency... 1 µm thick layer... incorporate twist between periodically arranged elements within metasurface layers... miniaturization of optical devices, chiral sensing, circular dichroism spectroscopy"