Switchable dual-functional guided-mode resonant filters based on VO₂ phase transition

Here we propose a hybrid dielectric waveguide grating with an ultrathin vanadium dioxide (VO 2 ) thin film for achieving switchable dual-functional GMR filters. We show that, when the VO 2 thin film undergoes the insulator-to-metal phase transition, the hybrid dielectric waveguide gratings enable the switch between the reflection and transmission filters. This work expands the research topic of GMR and provides valuable strategy for the design of novel reconfigurable devices for photonics.