One- and two-dimensional spectral diffusion of type-II excitons in InP/InAs/InP core-multishell nanowires

• MASUMOTO, Yasuaki

• Goto, Ken

• Yoshida, Seitaro

• Sakuma, Yoshiki

• Mohan, Premila

• Motohisa, Junichi

• Fukui, Takashi

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.

Journal

• Physical review B

  Physical review B 82 (7), 075313-, 2010-08

  American Physical Society

Details

• CRID: 1050001202617569536
• NII Article ID: 120007137959
• NII Book ID: AA11187113
• HANDLE: 2241/106286
• HANDLE: 2115/43799
• ISSN: 10980121
• Web Site: https://tsukuba.repo.nii.ac.jp/records/20231
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles
  • KAKEN