Phonon Effects on Population Inversion in Quantum Dots: Resonant, Detuned and Frequency-Swept Excitations
D.E. Reiter a, S. Lüker a, K. Gawarecki b, A. Grodecka-Grad c, P. Machnikowski b, V.M. Axt d and T. Kuhn a
aInstitut für Festkörpertheorie, Universität Münster, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany
bInstitute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
cQUANTOP, Danish National Research Foundation Center for Quantum Optics, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen Ø, Denmark
dTheoretische Physik III, Universität Bayreuth, 95440 Bayreuth, Germany
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The effect of acoustic phonons on different light-induced excitations of a semiconductor quantum dot is investigated. Resonant excitation of the quantum dot leads to the Rabi oscillations, which are damped due to the phonon interaction. When the excitation frequency is detuned, an occupation can only occur due to phonon absorption or emission processes. For frequency-swept excitations a population inversion: is achieved through adiabatic rapid passage, but the inversion is also damped by phonons. For all three scenarios the influence of the phonons depends non-monotonically on the pulse area.
DOI: 10.12693/APhysPolA.122.1065
PACS numbers: 78.67.Hc, 78.47.D-, 42.50.Md