Ultrafast nonlinear spectroscopy of individual quantum dots: imaging and coherent coupling

Jacek Kasprzak, Brian Patton, Wolfgang Langbein

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

Abstract

We review our recent advances in four-wave mixing spectroscopy of individual semiconductor quantum dots using heterodyne spectral interferometry, a novel implementation of transient nonlinear spectroscopy allowing the study of the transient nonlinear polarization emitted from individual electronic transitions in both amplitude and phase. We present experiments on individual excitonic transitions localized in monolayer islands of a GaAs/AlAs quantum well. The detection of amplitude and phase allows the implementation of a twodimensional femtosecond spectroscopy, in which mutual coherent coupling of single quantum dot states can be observed and quantified. By combining two-dimensional femtosecond spectroscopy with four-wave mixing mapping in the real space we found coherent coupling between spatially separated excitons by up to ~ 0.8 μm.

Original languageEnglish
Title of host publicationUltrafast Phenomena in Semiconductors and Nanostructure Materials XII
Number of pages9
Volume6892
DOIs
Publication statusPublished - 21 Apr 2008
EventUltrafast Phenomena in Semiconductors and Nanostructure Materials XII - San Jose, CA, United States
Duration: 20 Jan 200823 Jan 2008

Conference

ConferenceUltrafast Phenomena in Semiconductors and Nanostructure Materials XII
CountryUnited States
CitySan Jose, CA
Period20/01/0823/01/08

Keywords

  • coherent coupling
  • excitons
  • four-wave mixing
  • quantum dots
  • spectral interferometry
  • ultrafast non-linear spectroscopy

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  • Cite this

    Kasprzak, J., Patton, B., & Langbein, W. (2008). Ultrafast nonlinear spectroscopy of individual quantum dots: imaging and coherent coupling. In Ultrafast Phenomena in Semiconductors and Nanostructure Materials XII (Vol. 6892). [68920Z] https://doi.org/10.1117/12.767661