Nonlinear optical response and exciton dephasing in quantum dots

Details Nonlinear optical response and exciton dephasing in quantum dots Nonlinear optical response and exciton dephasing in quantum dots

2006-03-02

arxiv.org/abs/cond-mat/0603052v1

phys. stat. sol. (b) 243, 2252 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

NOEKS-8 contribution; 4 pages, 3 figures

Scientific paper

10.1002/pssb.200668036

The full time-dependent four-wave mixing polarization in quantum dots is microscopically calculated, taking into account acoustic phonon-assisted transitions between different exciton states of the dot. It is shown that quite different dephasing times of higher exciton states in pancake anisotropic InGaAs quantum dots are responsible for the experimentally observed [1] double-exponential decay in the photon echo signal.

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