The field of upconversion nanoparticle research has had some very interesting developments lately. Turns out a room-temperature quantum process called “superfluorescence” (also known by physicists as “superirradiance”) can be harnessed to massively increase the amount of light emitted by our favourite upconversion nanoparticles. This could lead to all sorts of exciting quantum sensing applications!
Read all about it in our recent ArXiv pre-print: https://arxiv.org/abs/2412.12891
