Observation of excitonic super-radiance in quantum well structures and its application for laser cooling of solids

Iman Hassani Nia, David Weinberg, Skylar Wheaton, Emily Allyn Weiss, Hooman Mohseni

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Excitons, bound electron-hole pairs, possess distinct physical properties from free electrons and holes that can be employed to improve the performance of optoelectronic devices. In particular, the signatures of excitons are enhanced optical absorption and radiative emission. These characteristics could be of major benefit for the laser cooling of semiconductors, a process which has stringent requirements on the parasitic absorption of incident radiation and the internal quantum efficiency. Here we experimentally demonstrate the dominant ultrafast excitonic super-radiance of our quantum well structure from 78 K up to room temperature. The experimental results are followed by our detailed discussions about the advantages and limitations of this method.

Original languageEnglish (US)
Title of host publicationOptical and Electronic Cooling of Solids
EditorsRichard I. Epstein, Mansoor Sheik-Bahae, Denis V. Seletskiy
ISBN (Electronic)9781510600003
StatePublished - Jan 1 2016
EventOptical and Electronic Cooling of Solids - San Francisco, United States
Duration: Feb 17 2016Feb 18 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherOptical and Electronic Cooling of Solids
Country/TerritoryUnited States
CitySan Francisco


  • Carrier density
  • Excitonic super-radiance
  • Excitons
  • Quantum wells
  • Radiative lifetime

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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