Single-photon superradiance in individual caesium lead halide quantum dots.

ABSTRACT: The brightness of an emitter is ultimately described by Fermi's golden rule, with a radiative rate proportional to its oscillator strength times the local density of photonic states. As the oscillator strength is an intrinsic material property, the quest for ever brighter emission has relied on the local density of photonic states engineering, using dielectric or plasmonic resonators^1,2. By contrast, a much less explored avenue is to boost the oscillator strength, and hence the emission rate, using a collective behaviour termed superradiance. Recently, it was proposed³ that the latter can be realized using the giant oscillator-strength transitions of a weakly confined exciton in a quantum well when its coherent motion extends over many unit cells. Here we demonstrate

SUBMITTER: Zhu C 

PROVIDER: S-EPMC10866711 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature