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Elliptical Polarization of Localized States in an Anisotropic Single GaAs Quantum Ring
- Source :
- Nanomaterials, Vol 13, Iss 1, p 184 (2022)
- Publication Year :
- 2022
- Publisher :
- MDPI AG, 2022.
-
Abstract
- Localized states in an anisotropic single GaAs quantum ring were investigated in terms of polarization dependence of micro-photoluminescence spectrum at 5K. Given four Stokes parameters measured with a pair of linear polarizers and waveplates, the elliptical polarization states of two different vertical confinement states (k=1 and k=2) were compared with phase, rotation, and ellipticity angles. While the polarized emission intensity of the k=2 states becomes enhanced along [1,1,0] compared to that along [1,1¯,0], the polarization asymmetry of the k=1 states shows the opposite result. We conclude the polarization state is determined by the shape of the lateral wavefunctions. In the k=2 state, crescent-like wavefunctions are strongly localized, but the k=1 state consists of two crescent-like wavefunctions, which are connected weakly through quantum tunneling.
- Subjects :
- quantum ring
localized states
polarization
Stokes parameter
Chemistry
QD1-999
Subjects
Details
- Language :
- English
- ISSN :
- 20794991
- Volume :
- 13
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- Nanomaterials
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.76a4572b84164cfcbd1cf78dbad9f14c
- Document Type :
- article
- Full Text :
- https://doi.org/10.3390/nano13010184