Scientists develop smart terahertz electro-optic modulator

https://phys.org/news/2022-07-scientists-smart-terahertz-electro-optic-modulator.html

"active and smart THz electro-optic modulator based on vanadium dioxide (VO2) film... transmission and absorption, also electrically modulate reflection and phase of THz waves... electric-current-induced insulator-to-metal transition... achieved near-perfect antireflection and 180° phase switching. Smart electro-optic THz control realized... VO2 structure using THz-electro-THz geometry feedback... THz amplitude achieved accurately no matter initial condition... and how external environment changed"