Electro-elastic tuning of single particles in individual self-assembled quantum dots.
basic_science · Level V
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- Record sourced from PubMed, PMID 22686397.
- Also identified by DOI 10.1021/nl301621u.
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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 (≈-0.22 meV/MPa) leads to variable tuning of exciton energies (+18 to -0.9 μeV/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.