Silicon metasurface transmission design enables high-contrast broadband switching for integrated optical computing/ high-speed LiDAR

https://www.eurekalert.org/news-releases/1143848

"semiconductor metasurfaces rely on high-quality factor resonances restricting efficient light control to narrow spectral ranges... overcome introducing asymmetrical, kink-like transmission spectrum: free-carrier excitation in pump-probe configuration for ultrafast 25-ps all-optical modulation across broadband optical pulse signals up to 49 nm wide... compact, chip-scale approach for handling short, multi-wavelength light pulses in high-speed optical communications and photonic computing systems"