Electronic and optical properties of an electro-magnetic non-uniform narrow quantum ring under repulsive scattering centre

Non-uniform height semiconductor quantum rings are studied in order to determine their electronic and optical absorption properties. Theoretical modelling of the structure includes an analytical description of the non-regular multi-hilled confining potential as well as the presence of repulsive scattering centre and external crossing electric and magnetic fields. We have discussed the features of localised and extended (rotational, Aharonov–Bohm-like) states in the presence of the magnetic field. A modification of the spectrum, with the appearance of a Stark-like behaviour, and its corresponding modification related to the repulsive potential is analysed when the electric field effect is considered. In double-hilled structures, these properties of the energy spectrum are of main importance in explaining the apparent optical transparency induced within a certain range of the electric field strength. The presence of the repulsive centre is found to cause a moderate redshift of the light absorption response. © 2020 Informa UK Limited, trading as Taylor & Francis Group.

• Fecha de publicación: 2020
• Institución: Universidad de Medellín
• Repositorio: Repositorio UDEM
• Idioma: eng
• OAI Identifier: oai:repository.udem.edu.co:11407/5948
• Acceso en línea: http://hdl.handle.net/11407/5948
• Palabra clave: 71.70.Ej; 73.21.2-b; 75.75.1+a; Aharonov–Bohm oscillations; linear and non-linear properties; non-uniform height quantum ring; pseudopotential; quantum ribbon; Quantum ring; Electric field effects; Electromagnetic wave scattering; Light absorption; Magnetic fields; Nanorings; Quantum confinement; Analytical description; Electric and magnetic fields; Electric field strength; Electronic and optical properties; Optical absorption properties; Optical transparency; Repulsive potentials; Theoretical modelling; Optical properties
• License: http://purl.org/coar/access_right/c_16ec