Coherent response of a quantum dot exciton driven by a rectangular spectrum optical pulse

A. J. Ramsay, R. S. Kolodka, F. Bello, P. W. Fry, W. K. Ng, A. Tahraoui, H. Y. Liu, M. Hopkinson, D. M. Whittaker, A. M. Fox, and M. S. Skolnick
Phys. Rev. B 75, 113302 – Published 7 March 2007

Abstract

We observe strong nonlinear absorption in the excitation profile of a single InGaAs quantum dot exciton driven by a rectangular spectrum optical pulse, in a region of detuning where the linear response is weak. Here the exciton is resonant with the temporal side-lobes of the pulse, which drive a damped Rabi oscillation. Good agreement is found between experiment and a two-level atom model. In the nonlinear regime the excitation profile exhibits features from both the rectangular spectrum and the two peaks present in the spectrum of the autocorrelation of the pulse.

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  • Received 8 December 2006

DOI:https://doi.org/10.1103/PhysRevB.75.113302

©2007 American Physical Society

Authors & Affiliations

A. J. Ramsay1,*, R. S. Kolodka1, F. Bello1, P. W. Fry2, W. K. Ng2, A. Tahraoui2, H. Y. Liu2, M. Hopkinson2, D. M. Whittaker1, A. M. Fox1, and M. S. Skolnick1

  • 1Department of Physics and Astronomy, University of Sheffield, Sheffield, S3 7RH, United Kingdom
  • 2Department of Electrical and Electronic Engineering, University of Sheffield, Sheffield, S1 3JD, United Kingdom

  • *Electronic address: a.j.ramsay@shef.ac.uk

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Vol. 75, Iss. 11 — 15 March 2007

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