On-chip multi-channel near-far field terahertz vortices with parity breaking and active modulation exhibit high purity and low crosstalk

https://www.eurekalert.org/news-releases/1080199

"helical dielectric metasurface, liquid crystal layer, helical plasmonic metasurface... external voltage switches near/far field vortices through spin-orbital angular momentum coupling/ photon state superposition... flexible/ dynamic free space/ on chip THz manipulation, promoting development of integrated photonic systems... THz high-speed communication, intelligent perception/ computing, communication, radar/ substance detection, light-field regulation devices, vortex beam generators, high-resolution imaging"

Related: New method enables flexible generation of high-order vector vortex beams
https://phys.org/news/2025-05-method-enables-flexible-generation-high.html