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Updated: Mar 15, 2026

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
Published on: October 13, 2017
Polaron-induced lattice distortion of (In,Ga)As/GaAs quantum dots by optically excited carriers
S Tiemeyer1, M Bombeck, H Göhring
1Fakultät Physik / DELTA, Technische Universität Dortmund, D-44221 Dortmund, Germany.
Abstract:
We report on a high resolution x-ray diffraction study unveiling the effect of carriers optically injected into (In,Ga)As quantum dots on the surrounding GaAs crystal matrix. We find a tetragonal lattice expansion with enhanced elongation along the [001] crystal axis that is superimposed on an isotropic lattice extension. The isotropic contribution arises from excitation induced lattice heating as confirmed by temperature dependent reference studies. The tetragonal expansion on the femtometer scale is tentatively attributed to polaron formation by carriers trapped in the quantum dots.
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