Ultrafast spectral interferometry of resonant secondary emission from quantum wells: From Rayleigh scattering to coherent emission from biexcitons

Dan Birkedal, Jagdeep Shah, L. N. Pfeiffer

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch


Recent investigations of secondary emission from quantum well excitons following ultrafast resonant excitation have demonstrated an intricate interplay of coherent Rayleigh scattering and incoherent luminescence. We have very recently demonstrated that it is possible to isolate and time resolve the coherent field associated with Rayleigh component using ultrafast spectral interferometry or Tadpole, thus, obtaining substantial and new information of the nature of resonant secondary emission. Our observation demonstrates that Rayleigh scattering from static disorder is inherently a non-ergodic process invalidating the use of current theories using ensemble averages to describe our observations. Furthermore, we report here a new and hitherto unknown coherent scattering mechanism involving the two-photon coherence associated with the biexciton transition. The process leaves an exciton behind taking up the recoil momentum and is hence intrinsic and instantaneous.
Original languageEnglish
Title of host publicationQuantum optoelectronics Technical Digest
PublisherOptical Society of America
Publication date1999
Publication statusPublished - 1999
EventQuantum optoelectronics - Snowmass Village at Aspen, Colorado, USA
Duration: 1 Jan 1999 → …


ConferenceQuantum optoelectronics
CitySnowmass Village at Aspen, Colorado, USA
Period01/01/1999 → …

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