Strain-tuning of quantum dot optical transitions via laser-induced surface defects

Abstract

We discuss the fine-tuning of the optical properties of self-assembled quantum dots by the strain perturbation introduced by laser-induced surface defects. We show experimentally that the quantum dot transition red-shifts, independently of the actual position of the defect, and that such frequency shift is about a factor five larger than the corresponding shift of a micropillar cavity mode resonance. We present a simple model that accounts for these experimental findings.

9 pages, 6 figures. To appear in Phys. Rev. B

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• Electro-elastic tuning of single particles in individual self-assembled quantum dots
• Self-error-corrected hyperparallel photonic quantum computation working with both the polarization and the spatial-mode degrees of freedom
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• Universal quantum gates on electron-spin qubits with quantum dots inside single-side optical microcavities