Light trapped in programmable subwavelength air cavities etched into high-refractive-index dielectric 2D bismuth telluride

https://www.eurekalert.org/news-releases/1118367

"silicon dielectric resonators trap light inside solids, keeping light away from surface, making interaction with 2D materials placed on top difficult... overcome trapping in air, concentrating/ interacting with tungsten disulfide located at cavity's top of cavity boosting light emission/ nonlinear optical signals... changing air voids' radius/ depth programs light interaction, tuning resonant wavelength to match specific materials... optical computing/ signal processing, more efficient LEDs/ lasers/ sensors"