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Origin of the blueshift of photoluminescence in a type-II heterostructure

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Title: Origin of the blueshift of photoluminescence in a type-II heterostructure
Authors: Jo, Masafumi Browse this author
Sato, Mitsuru Browse this author
Miyamura, Souta Browse this author
Sasakura, Hirotaka Browse this author →KAKEN DB
Kumano, Hidekazu Browse this author →KAKEN DB
Suemune, Ikuo Browse this author →KAKEN DB
Keywords: Quantum well
type-II
Blueshift
Excitons
GaSb
GaAs
Photoluminescence
Issue Date: 27-Nov-2012
Publisher: Springer
Journal Title: Nanoscale Research Letters
Volume: 7
Issue: 1
Start Page: 654-1
End Page: 654-5
Publisher DOI: 10.1186/1556-276X-7-654
Abstract: Blueshifts of luminescence observed in type-II heterostructures are quantitatively examined in terms of a self-consistent approach including excitonic effects. This analysis shows that the main contribution to the blueshift originates from the well region rather than the variation of triangular potentials formed in the barrier region. The power law for the blueshift, ΔEPL ∝ Plaserm, from m = 1/2 for lower excitation Plaser to m = 1/4 for higher excitation, is obtained from the calculated results combined with a rate equation analysis, which also covers the previously believed m = 1/3 power law within a limited excitation range. The present power law is consistent with the blueshift observed in a GaAsSb/GaAs quantum well.
Rights: http://creativecommons.org/licenses/by/2.0
Type: article
URI: http://hdl.handle.net/2115/59631
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 熊野 英和

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