Intense laser effects on the optical properties of asymmetric GaAs double quantum dots under applied electric field

Doina Bejan () and Ecaterina Cornelia Niculescu
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Doina Bejan: University of Bucharest, Faculty of Physics
Ecaterina Cornelia Niculescu: Physics Department, Politehnica University of Bucharest

The European Physical Journal B: Condensed Matter and Complex Systems, 2016, vol. 89, issue 6, 1-10

Abstract: Abstract We investigated the combined effects of a non-resonant intense laser field and a static electric field on the electronic structure and the nonlinear optical properties (absorption, optical rectification) of a GaAs asymmetric double quantum dot under a strong probe field excitation. The calculations were performed within the compact density-matrix formalism under steady state conditions using the effective mass approximation. Our results show that: (i) the electronic structure and optical properties are sensitive to the dressed potential; (ii) under applied electric fields, an increase of the laser intensity induces a redshift of the optical absorption and rectification spectra; (iii) the augment of the electric field strength leads to a blueshift of the spectra; (iv) for high electric fields the optical spectra show a shoulder-like feature, related with the occurrence of an anti-crossing between the two first excited levels.

Keywords: Mesoscopic; and; Nanoscale; Systems (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1140/epjb/e2016-70115-6

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