Impurity-related linear and nonlinear optical response in quantum-well wires with triangular cross section

ABSTRACT: The 1s-like and 2p-like donor impurity energy states are studied in a semiconductor quantum wire of equilateral triangular cross section as functions of the impurity position and the geometrical size of the structure. Linear and nonlinear coefficients for the optical absorption and relative refractive index change associated with 1s-2p transitions are calculated for both the x-polarization and y-polarization of the incident light. The results show a mixed effect of redshift and blueshift depending on the location of the donor atom. Also, strong nonlinear contributions to the optical absorption coefficient are obtained for both polarizations in the on-center impurity case.

• Autores: Duque Echeverri, Carlos Alberto; Mora Ramos, Miguel Eduardo; Kasapoglu, Esin; Ungan, Fatih; Yesilgul, Unal; Sakiroglu, Serpil; Sokmen, Ismail
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2013
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/13351
• Acceso en línea: http://hdl.handle.net/10495/13351
• Palabra clave: Óptica no lineal; Nonlinear optics; Pozos cuánticos; Quantum wells; Índice de refracción; Refractive index; Óptica lineal; Cables de pozo cuántico; Coeficientes lineales; Coeficientes no lineales; Absorción óptica
• Rights: openAccess
• License: http://creativecommons.org/licenses/by-nc-nd/2.5/co/