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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 7 — Jul. 1, 2012
  • pp: 1766–1771

Coherent response of individual weakly confined exciton–biexciton systems

Jacek Kasprzak and Wolfgang Langbein  »View Author Affiliations


JOSA B, Vol. 29, Issue 7, pp. 1766-1771 (2012)
http://dx.doi.org/10.1364/JOSAB.29.001766


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Abstract

We investigate the coherent optical response of individual localized exciton–biexciton (XXX) systems formed at interface fluctuations of a growth-interrupted GaAs/AlAs quantum well. We apply heterodyne spectral interferometry to perform two-dimensional four-wave mixing (FWM) spectroscopy. We retrieve the binding energy of bound and unbound XXs, as well as characterize the system in terms of biexciton–exciton dipole moment ratio and mutual FWM phase. Polarization selection rules of the FWM are determined. FWM hyperspectral imaging and autocorrelation analysis reveal the expected spatial colocalization of XXs with respect to their Xs. A value for the biexciton renormalization in a coherently coupled pair of Xs is retrieved. Our study gives insight into the coherent optical properties of an exciton–biexciton system with a confinement energy comparable to the biexciton binding energy.

© 2012 Optical Society of America

OCIS Codes
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(190.4720) Nonlinear optics : Optical nonlinearities of condensed matter
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(270.1670) Quantum optics : Coherent optical effects
(300.6290) Spectroscopy : Spectroscopy, four-wave mixing
(300.6310) Spectroscopy : Spectroscopy, heterodyne

ToC Category:
Nonlinear Optics

History
Original Manuscript: February 22, 2012
Revised Manuscript: May 1, 2012
Manuscript Accepted: May 1, 2012
Published: June 25, 2012

Citation
Jacek Kasprzak and Wolfgang Langbein, "Coherent response of individual weakly confined exciton–biexciton systems," J. Opt. Soc. Am. B 29, 1766-1771 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-7-1766

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