CUED Publications database

Resonant excitation and imaging of nonequilibrium exciton spins in single core-shell GaAs-AlGaAs nanowires.

Hoang, TB and Titova, LV and Yarrison-Rice, JM and Jackson, HE and Govorov, AO and Kim, Y and Joyce, HJ and Tan, HH and Jagadish, C and Smith, LM (2007) Resonant excitation and imaging of nonequilibrium exciton spins in single core-shell GaAs-AlGaAs nanowires. Nano Lett, 7. pp. 588-595. ISSN 1530-6984

Full text not available from this repository.

Abstract

Nonequilibrium spin distributions in single GaAs/AlGaAs core-shell nanowires are excited using resonant polarized excitation at 10 K. At all excitation energies, we observe strong photoluminescence polarization due to suppressed radiative recombination of excitons with dipoles aligned perpendicular to the nanowire. Excitation resonances are observed at 1- or 2-LO phonon energies above the exciton ground states. Using rate equation modeling, we show that, at the lowest energies, strongly nonequilibrium spin distributions are present and we estimate their spin relaxation rate.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Electronics, Power & Energy Conversion
Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:28
Last Modified: 02 Jun 2014 01:13
DOI: 10.1021/nl062383q

Actions (login required)

View Item