articleNatureJan 31, 2024HYBRID OA

Single-photon superradiance in individual caesium lead halide quantum dots

CZChenglian ZhuSCSimon C. BoehmeLGLeon G. FeldAMAnastasiia MoskalenkoDNDmitry N. Dirin

ETH Zurich · Swiss Federal Laboratories for Materials Science and Technology · +3 more institutions

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Abstract

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 proposed 3 that the latter can be realized using the giant oscillator-strength transitions of a weakly confined exciton in a quantum well when…

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Topics & keywords

Topics
Keywords
  • Superradiance
  • Oscillator strength
  • Physics
  • Quantum dot
  • Exciton
  • Biexciton
  • Fermi's golden rule
  • Photon
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