We investigate the emission of multimodal polarized light from Light Emitting Devices due to spin-aligned carriers injection. The results are derived through operator Langevin equations, which include thermal and carrier-injection fluctuations, as well as non-radiative recombination and electronic g-factor temperature dependence. We study the dynamics of the optoelectronic processes and show how the temperature-dependent g-factor and magnetic field affect the polarization degree of the emitted light. In addition, at high temperatures, thermal fluctuation reduces the efficiency of the optoelectronic detection method for measuring spin-polarization degree of carrier injection into non-magnetic semicondutors.
@article{arxiv.cond-mat/0311115,
title = {Modelling of Optical Detection of Spin-Polarized Carrier Injection into Light-Emitting Devices},
author = {M. C. de Oliveira and He Bi Sun},
journal= {arXiv preprint arXiv:cond-mat/0311115},
year = {2009}
}
Comments
15 pages, 7 figures, replaced by revised version. To appear in Phys. Rev. B