WARF TECHNOLOGIES

UW-Madison researchers created a dielectric antenna (realized using crystalline Si), to efficiently extract broadband single-photon fluorescence from shallow quantum centers in solid-state systems into free space. This structure features relatively easy-to-pattern high-index Si resonators on the diamond surface to boost photon extraction by overcoming total internal reflection and Fresnel reflection at the diamond-air interface, and providing modest Purcell enhancement, without etching or otherwise damaging the diamond surface. This is a way to get a lot more light out of these quantum centers without doing damage to the solid-state material -- a critical technology gap. 

• Mikhail Kats

• https://pubs.acs.org/doi/10.1021/acs.nanolett.4c04299

• Semiconductors & Integrated Circuits : Other semiconductor technologies