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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)
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Submitter: 熊野 英和
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