Coherent Nonlinear Optical Response of Single Quantum Dots Studied by Ultrafast Near-Field Spectroscopy

Tobias Guenther, Christoph Lienau, Thomas Elsaesser, Markus Glanemann, Vollrath Martin Axt, Tilmann Kuhn, Soheyla Eshlaghi, and Andreas D. Wieck
Phys. Rev. Lett. 89, 057401 – Published 15 July 2002; Erratum Phys. Rev. Lett. 89, 179901 (2002)

Abstract

The nonlinear response of single GaAs quantum dots is studied in femtosecond near-field pump-probe experiments. At negative time delays, transient reflectivity spectra show pronounced oscillatory structure around the quantum dot exciton line, providing the first evidence for a perturbed free induction decay of the excitonic polarization. Phase-disturbing Coulomb interactions between the excitonic polarization and continuum excitations dominate the optical nonlinearity on ultrafast time scales. A theoretical analysis based on the semiconductor Bloch equations accounts for this behavior.

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  • Received 21 February 2002

DOI:https://doi.org/10.1103/PhysRevLett.89.057401

©2002 American Physical Society

Erratum

Erratum: Coherent Nonlinear Optical Response of Single Quantum Dots Studied by Ultrafast Near-Field Spectroscopy [Phys. Rev. Lett.PRLTAO0031-9007 89, 057401 (2002)]

Tobias Guenther, Christoph Lienau, Thomas Elsaesser, Markus Glanemann, Vollrath Martin Axt, Tilmann Kuhn, Soheyla Eshlaghi, and Andreas D. Wieck
Phys. Rev. Lett. 89, 179901 (2002)

Authors & Affiliations

Tobias Guenther, Christoph Lienau, and Thomas Elsaesser

  • Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, D-12489 Berlin, Germany

Markus Glanemann, Vollrath Martin Axt, and Tilmann Kuhn

  • Institut für Festkörpertheorie, Universität Münster, D-48149 Münster, Germany

Soheyla Eshlaghi and Andreas D. Wieck

  • Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, D-44870 Bochum, Germany

Comments & Replies

Comment on “Coherent Nonlinear Optical Response of Single Quantum Dots Studied by Ultrafast Near-Field Spectroscopy”

M. Joffre
Phys. Rev. Lett. 90, 139701 (2003)

Guenther et al. Reply:

T. Guenther, C. Lienau, T. Elsaesser, M. Glanemann, V. M. Axt, and T. Kuhn
Phys. Rev. Lett. 90, 139702 (2003)

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Vol. 89, Iss. 5 — 29 July 2002

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