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One- and two-dimensional spectral diffusion of type-II excitons in InP/InAs/InP core-multishell nanowires
| Title: | One- and two-dimensional spectral diffusion of type-II excitons in InP/InAs/InP core-multishell nanowires |
| Authors: | Masumoto, Yasuaki Browse this author | | Goto, Ken Browse this author | | Yoshida, Seitaro Browse this author | | Sakuma, Yoshiki Browse this author | | Mohan, Premila Browse this author | | Motohisa, Junichi Browse this author | | Fukui, Takashi Browse this author |
| Issue Date: | 15-Aug-2010 |
| Publisher: | American Physical Society |
| Journal Title: | Physical Review B |
| Volume: | 82 |
| Issue: | 7 |
| Start Page: | 075313 |
| Publisher DOI: | 10.1103/PhysRevB.82.075313 |
| Abstract: | Spectral diffusion of type-II excitons in InP/InAs/InP core-multishell nanowires (CMNs) and type-I excitons in an InAs/InP single quantum well (SQW) was studied by means of time-resolved and spectrally resolved photoluminescence. InP/InAs/InP CMNs in hexagonal symmetry are made of six facets and six edges which work as two-dimensional quantum wells and one-dimensional quantum wires, respectively. At 5 K type-II excitons lose their energy in two stages. In the first stage, two-dimensional spectral diffusion takes place in the type-II quantum well region in CMNs similar to spectral diffusion of type-I excitons in the InAs/InP SQW. In the second stage, slower one-dimensional spectral diffusion takes place in the quantum wire region in CMNs. Acoustic-phonon-mediated migration of excitons to lower-energy-localized states leads to the spectral diffusion in two dimensions and one dimension. |
| Rights: | ©2010 The American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/43799 |
| 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)
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Submitter: 福井 孝志
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