Actively tunable plasmonic nanogap cavities in the near-infrared using VO2

Actively tunable optical materials integrated with engineered subwavelength structures could enable a new generation of optoelectronic devices with low power consumption for on-chip hyperspectral focal plane arrays or optical beam steering. Phase-change materials, such as vanadium dioxide (VO2), are a promising solid-state solution for dynamic tuning; however, previous demonstrations have focused on VO2 films with >50 nm thickness, limiting...