Park, Seongho Kim, Minju Kim, Inhong Taylor, Robert A. Song, Jindong Kyhm, Kwangseuk 2024-01-19T10:31:03Z 2024-01-19T10:31:03Z 2023-01-26 2023-01 2079-4991 https://pubs.kist.re.kr/handle/201004/114147 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(sic) ,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. English MDPI Elliptical Polarization of Localized States in an Anisotropic Single GaAs Quantum Ring Article 10.3390/nano13010184 1 Nanomaterials, v.13, no.1 Nanomaterials 13 1 Y scie scopus 000909698100001 2-s2.0-85145833974 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article DYNAMICS quantum ring localized states polarization Stokes parameter