dor_id: 4107228

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856.4.0.u: https://rmf.smf.mx/ojs/rmf/article/view/3240/3208

100.1.#.a: Yee Rendón, C. M.; López López, M.; Meléndez Lira.

524.#.#.a: Yee Rendón, C. M., et al. (2004). Influence of indium segregation on the light emission of piezoelectric InGaAs/GaAs quantum wells grown by molecular beam epitaxy. Revista Mexicana de Física; Vol 50, No 2: 193-0. Recuperado de https://repositorio.unam.mx/contenidos/4107228

245.1.0.a: Influence of indium segregation on the light emission of piezoelectric InGaAs/GaAs quantum wells grown by molecular beam epitaxy

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Facultad de Ciencias, UNAM

264.#.0.c: 2004

264.#.1.c: 2004-01-01

653.#.#.a: Quantum wells; piezoelectric field; Indium segregation

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-ND 4.0 Internacional, https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es, fecha de asignación de la licencia 2004-01-01, para un uso diferente consultar al responsable jurídico del repositorio por medio de rmf@ciencias.unam.mx

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001.#.#.#: oai:ojs.rmf.smf.mx:article/3240

041.#.7.h: eng

520.3.#.a: Pseudomorphic In 0.2 Ga 0.8 As/GaAs quantum wells (QWs) were grown by molecular beam epitaxy (MBE) on GaAs substrates oriented along the (11n) direction, with n=1,2,3,4. The optical and structural properties of the heterostructures were studied by photoluminescence spectroscopy (PL) at 14, 77 and 300 K, and atomic force microscopy (AFM) measurements. The emission wavelength from the QWs has two contributions, a blue shift due to the compressive strain, and a red shift due to the quantum confined Stark effect produced by the piezoelectric field present in these materials. A traditional theoretical interpretation of the QWs emission employing a simple well model shows discrepancies with the experimental results. In order to satisfactorily explain the emission wavelength we proposed to include segregation effects of In at the wells interfaces. The matrix transfer method was implemented to solve numerically the Schrödinger equation taking into account In segregation effects by including an asymmetric potential well with a profile depending on the details of the In incorporation. With segregation effects included in the emission calculations, the theoretical predictions reproduce very well the experimental values of PL emission. Our results demostrate that in order to have efficient InGaAs QWs-based optoelectronic devices is very important to take into account interfacial segregation effects.

773.1.#.t: Revista Mexicana de Física; Vol 50, No 2 (2004): 193-0

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046.#.#.j: 2020-11-25 00:00:00.000000

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handle: 4bc68bd1f4c440a7

harvesting_date: 2020-09-23 00:00:00.0

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last_modified: 2020-11-27 00:00:00

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Artículo

Influence of indium segregation on the light emission of piezoelectric InGaAs/GaAs quantum wells grown by molecular beam epitaxy

Yee Rendón, C. M.; López López, M.; Meléndez Lira.

Facultad de Ciencias, UNAM, publicado en Revista Mexicana de Física, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Entidad o dependencia
Facultad de Ciencias, UNAM
Revista
Repositorio
Contacto
Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx

Cita

Yee Rendón, C. M., et al. (2004). Influence of indium segregation on the light emission of piezoelectric InGaAs/GaAs quantum wells grown by molecular beam epitaxy. Revista Mexicana de Física; Vol 50, No 2: 193-0. Recuperado de https://repositorio.unam.mx/contenidos/4107228

Descripción del recurso

Autor(es)
Yee Rendón, C. M.; López López, M.; Meléndez Lira.
Tipo
Artículo de Investigación
Área del conocimiento
Físico Matemáticas y Ciencias de la Tierra
Título
Influence of indium segregation on the light emission of piezoelectric InGaAs/GaAs quantum wells grown by molecular beam epitaxy
Fecha
2004-01-01
Resumen
Pseudomorphic In 0.2 Ga 0.8 As/GaAs quantum wells (QWs) were grown by molecular beam epitaxy (MBE) on GaAs substrates oriented along the (11n) direction, with n=1,2,3,4. The optical and structural properties of the heterostructures were studied by photoluminescence spectroscopy (PL) at 14, 77 and 300 K, and atomic force microscopy (AFM) measurements. The emission wavelength from the QWs has two contributions, a blue shift due to the compressive strain, and a red shift due to the quantum confined Stark effect produced by the piezoelectric field present in these materials. A traditional theoretical interpretation of the QWs emission employing a simple well model shows discrepancies with the experimental results. In order to satisfactorily explain the emission wavelength we proposed to include segregation effects of In at the wells interfaces. The matrix transfer method was implemented to solve numerically the Schrödinger equation taking into account In segregation effects by including an asymmetric potential well with a profile depending on the details of the In incorporation. With segregation effects included in the emission calculations, the theoretical predictions reproduce very well the experimental values of PL emission. Our results demostrate that in order to have efficient InGaAs QWs-based optoelectronic devices is very important to take into account interfacial segregation effects.
Tema
Quantum wells; piezoelectric field; Indium segregation
Idioma
eng
ISSN
2683-2224 (digital); 0035-001X (impresa)

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