Photoluminescence excitation spectra of one-dimensional electron systems in an n-type doped quantum wire

Toshiyuki Ihara, Y. Hayamizu, M. Yoshita, H. Akiyama, L. N. Pfeiffer, K. W. West

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Photoluminescence (PL) and PL excitation (PLE) spectra have been measured on a high-quality n-type-modulation-doped single GaAs quantum wire with a gate, where density of one-dimensional (1D) electron gas is tuned by gate voltage. We demonstrate that the absorption line shape of trions varies from symmetric to asymmetric with electron density. The high energy tail of the trion peak is analogous to a power-law anomaly in Fermi-edge singularity of 1D electron gas. The peak of trions shows no shift with electron density, while a peak of exciton shows blue-shifts. For higher electron density, the peak of trions changes to a shoulder corresponding to an absorption onset of an electron-plasma system. We found large energy gap between a high-energy cut-off in PL and a PLE onset in the wire.

Original languageEnglish (US)
Title of host publicationPHYSICS OF SEMICONDUCTORS
Subtitle of host publication27th International Conference on the Physics of Semiconductors, ICPS-27
Pages887-888
Number of pages2
DOIs
StatePublished - Jun 30 2005
Externally publishedYes
EventPHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27 - Flagstaff, AZ, United States
Duration: Jul 26 2004Jul 30 2004

Publication series

NameAIP Conference Proceedings
Volume772
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferencePHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27
Country/TerritoryUnited States
CityFlagstaff, AZ
Period7/26/047/30/04

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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