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Issue 44, 2017
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Tuning of few-electron states and optical absorption anisotropy in GaAs quantum rings

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Abstract

The electronic and optical properties of a GaAs quantum ring (QR) with few electrons in the presence of the Rashba spin–orbit interaction (RSOI) and the Dresselhaus spin–orbit interaction (DSOI) have been investigated theoretically. The configuration interaction (CI) method is employed to calculate the eigenvalues and eigenstates of the multiple-electron QR accurately. Our numerical results demonstrate that the symmetry breaking induced by the RSOI and DSOI leads to an anisotropic distribution of multi-electron states. The Coulomb interaction offers additional modulation of the electron distribution and thus the optical absorption indices in the quantum rings. By tuning the magnetic/electric fields and/or electron numbers in a quantum ring, one can change its optical properties significantly. Our theory provides a new way to control the multi-electron states and optical properties of a QR by hybrid modulations or by electrical means only.

Graphical abstract: Tuning of few-electron states and optical absorption anisotropy in GaAs quantum rings

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Publication details

The article was received on 19 Aug 2017, accepted on 24 Oct 2017 and first published on 26 Oct 2017


Article type: Paper
DOI: 10.1039/C7CP05675C
Citation: Phys. Chem. Chem. Phys., 2017,19, 30048-30054
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    Tuning of few-electron states and optical absorption anisotropy in GaAs quantum rings

    Z. Wu, J. Li, J. Li, H. Yin and Y. Liu, Phys. Chem. Chem. Phys., 2017, 19, 30048
    DOI: 10.1039/C7CP05675C

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