Magnetoabsorption spectra of intraexcitonic transitions in GaAs-(Ga,Al)As semiconductor quantum wells

ABSTRACT: We present a theoretical study, within the effective-mass approximation, of the magnetoabsorption spectra of intraexcitonic terahertz transitions of light-hole and heavy-hole confined magnetoexcitons in GaAs-~Ga,Al!As quantum wells. The semiconductor quantum wells are studied under magnetic fields applied in the growth direction of the semiconductor heterostructure. The various magnetoexciton states are obtained in the effective-mass approximation by an expansion of the exciton-envelope wave functions in terms of products of hole and electron quantum-well states with appropriate Gaussian functions for the various excitonic states. Intramagnetoexciton transitions are theoretically studied by exciting the allowed excitonic transitions with s1 ~or s2! far-infrared radiation circularly polarized in the plane of the GaAs-~Ga,Al!As quantum well. Theoretical results are obtained for the intramagnetoexciton transition energies and magneto-absorption spectra associated with excitations from 1s-like to 2p6 , and 3p6-like magnetoexciton states, and found in overall agreement with optically detected resonance measurements.

• Autores: Barticevic, Zdenka; Pacheco, Mónica; Duque Echeverri, Carlos Alberto; Oliveira, Luiz Eduardo
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2002
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/8632
• Acceso en línea: http://hdl.handle.net/10495/8632
• Palabra clave: Semiconductores; Semiconductors; Campos Magnéticos; Magnetic Fields; Electrones; Electrons; Pozos cuánticos; Quantum wells; Radiación infrarroja; Infrared radiation; Espectros de absorción; Heteroestructuras; http://aims.fao.org/aos/agrovoc/c_3867
• Rights: openAccess
• License: http://creativecommons.org/licenses/by-nc-nd/2.5/co/