Superfluorescence from Electron-Hole Plasma at Moderate Temperatures of 175 K: Article No. 063803

Ajay Poonia, Barnali Mondal, Matthew Beard, Angshuman Nag, K. Adarsh

Research output: Contribution to journalArticlepeer-review

2 Scopus Citations


Superfluorescence, a cooperative coherent spontaneous emission, is of great importance to the understanding of many-body correlation in optical processes. Even though superfluorescence has been demonstrated in many diverse systems, it is hard to observe in electron-hole plasma (EHP) due to its rapid dephasing and hence needs strong magnetic fields or complex microcavities. Herein, we report the first experimental observation of superfluorescence from EHP up to a moderate temperature of 175 K without external stimuli in a coupled metal halide perovskite quantum dots film. The EHP exhibits macroscopic quantum coherence through spontaneous synchronization. The coherence of the excited state decays by superfluorescence, which is redshifted 40 meV from the spontaneous emission with a ~1700 times faster decay rate and exhibits quadratic fluence dependence. Notably, the excited state population's delayed growth and abrupt decay, which are strongly influenced by the pump fluence and the Burnham-Chiao ringing, are the characteristics of the superfluorescence. Our findings will open up a new frontier for cooperative emission and light beam-based technologies.
Original languageAmerican English
Number of pages6
JournalPhysical Review Letters
Issue number6
StatePublished - 2024

NREL Publication Number

  • NREL/JA-5F00-89051


  • light-matter interaction
  • photonics
  • spontaneous emission
  • ultrafast optics


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