Photoluminescence Enhancement of InAs(Bi) Quantum Dots by Bi Clustering
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概要
- 論文の詳細を見る
The distribution of bismuth in InAs<inf>1-x</inf>Bi<inf>x</inf>/GaAs quantum dots is analyzed by atomic-column resolution electron microscopy and imaging simulation techniques. A random Bi distribution is measured in the case of {<}0.03 ML/s Bi flux during the InAs growth with no significant variations in the shape or size of quantum dots, resulting in a low redshift and the degradation of the photoluminescence. However, for a 0.06 ML/s Bi flux the lateral indium segregation into the quantum dots is enhanced and Bi is incorporated inside them. As a result, a strong redshift and an increase of the peak intensity are found in this sample.
- 2013-04-25
著者
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Gonzalez David
Departamento De Ciencia De Los Materiales E I. M. Y Q. I. Universidad De Cadiz
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Roldan Manuel
Condensed Matter Science Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, U.S.A.
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David John
The University of Sheffield, Department of Electronic and Electrical Engineering, Sheffield S1 3JD, U.K.
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Hunter Cristopher
The University of Sheffield, Department of Electronic and Electrical Engineering, Sheffield S1 3JD, U.K.
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Mayoral Alvaro
Laboratorio de Microscopías Avanzadas (LMA), Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza, Mariano Esquillor, Edificio I+D, 50018, Zaragoza, Spain
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Sales David
Departamento de Ciencia de los Materiales e IM y QI, Universidad de Cádiz, 11510 Puerto Real (Cádiz), Spain
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Sales David
Departamento de Ciencia de los Materiales e IM y QI, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
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Reyes Daniel
Departamento de Ciencia de los Materiales e IM y QI, Universidad de Cádiz, 11510 Puerto Real (Cádiz), Spain
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Dominguez Lara
Departamento de Ciencia de los Materiales e IM y QI, Universidad de Cádiz, 11510 Puerto Real (Cádiz), Spain
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Bastiman Faebian
The University of Sheffield, Department of Electronic and Electrical Engineering, Sheffield S1 3JD, U.K.
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Guerrero Elisa
Departamento de Lenguajes y Sistemas Informáticos, Universidad de Cádiz, Campus Rio San Pedro, 11510 Puerto Real, Cádiz, Spain
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Guerrero Elisa
Departamento de Lenguajes y Sistemas Informáticos, Universidad de Cádiz, Campus Rio San Pedro, 11510 Puerto Real, Cádiz, Spain
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