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Under vacuum photoluminescence study of vertically stacked InAs GaAs quantum dots
Author
Source
Issue
Vol. 7, Issue 1 (30 Jun. 2014), pp.1-6, 6 p.
Publisher
Yarmouk University Deanship of Research and Graduate Studies
Publication Date
2014-06-30
Country of Publication
Jordan
No. of Pages
6
Main Subjects
Topics
Abstract EN
This work presents a study of photoluminescence (PL) in vacuum from vertically stacked InAs/GaAs quantum dots on (100) N+ oriented GaAs substrate.
A PL system in ultra-high vacuum that was coupled onto a molecular beam epitaxy (MBE) chamber was used in order to avoid the oxidation of the quantum dots.
After carrying out the PL of the first layer, the same sample has been returned back to the MBE chamber to grow a second, third, forth and fifth layer of QDs, where after every layer the sample has been taken out of the MBE to the PL system.
A clear double peak structure revealing a bimodel size distribution of the QDs has been shown by the power and the temperature dependent PL studies.
This bimodel size distribution of the QDs has been also confirmed by an atomic force microscopy (AFM) image.
A blue shift in the PL was observed after the deposition of the second layer due to the generation of a strain field which results in the formation of a second QD layer with different structure and dimensions compared to the first QD layer.
The present observations can help improve understanding the dependence of the optical properties of InAs/GaAs QDs on inter-diffusion of In and Ga atoms during the growth of a new layer due to annealing effect.
American Psychological Association (APA)
Abu War, Ziad Y.. 2014. Under vacuum photoluminescence study of vertically stacked InAs GaAs quantum dots. Jordan Journal of Physics،Vol. 7, no. 1, pp.1-6.
https://search.emarefa.net/detail/BIM-378346
Modern Language Association (MLA)
Abu War, Ziad Y.. Under vacuum photoluminescence study of vertically stacked InAs GaAs quantum dots. Jordan Journal of Physics Vol. 7, no. 1 (2014), pp.1-6.
https://search.emarefa.net/detail/BIM-378346
American Medical Association (AMA)
Abu War, Ziad Y.. Under vacuum photoluminescence study of vertically stacked InAs GaAs quantum dots. Jordan Journal of Physics. 2014. Vol. 7, no. 1, pp.1-6.
https://search.emarefa.net/detail/BIM-378346
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 5-6
Record ID
BIM-378346