Work

Resonant Excitation and Imaging of Nonequilibrium Exciton Spins in Single Core−Shell GaAs−AlGaAs Nanowires

Year: 2007

Type: article

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.

Source: Nano Letters

DOI: 10.1021/nl062383q

Authors: Thang Ba Hoang, Lyubov V. Titova, Jan M. Yarrison-Rice, Howard E. Jackson, Alexander O. Govorov, Yong Kim, Hannah J. Joyce, H. Hoe Tan, Chennupati Jagadish, Leigh M. Smith

Institutions: Australian National University, Ohio University, Dong-A University, University of Cincinnati, Miami University

Language: English

Topic: Semiconductor Quantum Structures and Devices

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: University of Cincinnati, Australian Research Council

OpenAlex ID: W2016465312

FWCI: 3.467

Cites: 24

Cited by: 53

Related to: 10