Photo-Induced Spin Dynamics in Semiconductor Quantum Wells
Abstract
We experimentally investigate the dynamics of spins in GaAs quantum wells under applied electric bias by photoluminescence (PL) measurements excited with circularly polarized light. The bias-dependent circular polarization of PL (P PL) with and without magnetic field is studied. The P PL without magnetic field is found to be decayed with an enhancement of increasing the strength of the negative bias. However, P PL in a transverse magnetic field shows oscillations under an electric bias, indicating that the precession of electron spin occurs in quantum wells. The results are discussed based on the electron-hole exchange interaction in the electric field.
Journal Title
Nanoscale Research Letters
Volume
4
Issue
4
Copyright Statement
© The Author(s) 2009. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Subject
Atomic, Molecular, Nuclear, Particle and Plasma Physics not elsewhere classified