Electro-elastic tuning of single particles in individual self-assembled quantum dots

Abstract

We investigate the effect of uniaxial stress on InGaAs quantum dots in a charge tunable device. Using Coulomb blockade and photoluminescence, we observe that significant tuning of single particle energies (~ -0.5 meV/MPa) leads to variable tuning of exciton energies (+18 to -0.9 micro-eV/MPa) under tensile stress. Modest tuning of the permanent dipole, Coulomb interaction and fine-structure splitting energies is also measured. We exploit the variable exciton response to tune multiple quantum dots on the same chip into resonance.

16 pages, 4 figures, 1 table. Final version

References in corpus (14)

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• Electromechanical wavelength tuning of double-membrane photonic crystal cavities
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• Theory of strain tunning exction coupling in self-assembled InAs/GaAs quantum dots