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Type-II behavior in wurtzite InP/InAs/InP core-multishell nanowires

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Title: Type-II behavior in wurtzite InP/InAs/InP core-multishell nanowires
Authors: Pal, B. Browse this author
Goto, K. Browse this author
Ikezawa, M. Browse this author
Masumoto, Y. Browse this author
Mohan, P. Browse this author
Motohisa, J. Browse this author →KAKEN DB
Fukui, T. Browse this author
Issue Date: Aug-2008
Publisher: American Institute of Physics
Journal Title: Applied Physics Letters
Volume: 93
Issue: 7
Start Page: 073105
Publisher DOI: 10.1063/1.2966343
Abstract: We study optical transitions from a periodic array of InP/InAs/InP core-multishell nanowires (CMNs) having a wurtzite crystal structure by using photoluminescence (PL) and PL excitation (PLE) spectroscopy. Observing a large Stokes shift between PL and PLE spectra, a blueshift of the PL peak with a cube-root dependence on the excitation power and a slow and nonexponential decay of PL with an effective decay time of 16 ns suggest a type-II band alignment. Band-offset calculation based on the "model-solid theory" of Van de Walle [Phys. Rev. B 39, 1871 (1989)] supports type-II band lineup if the InAs layer in the wurtzite CMNs is assumed to sustain compressive strain in all directions.
Rights: Copyright 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Type: article
Appears in Collections:量子集積エレクトロニクス研究センター (Research Center for Integrated Quantum Electronics) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 福井 孝志

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