We study in theory the generation and detection of electron spin coherence in nonlinear optical spectroscopy of semiconductor quantum dots doped with single electrons. In third-order differential transmission spectra, the inverse width of the ultra-narrow peak at degenerate pump and probe frequencies gives the spin relaxation time (T1), and that of the Stoke and anti-Stoke spin resonances gives the effective spin dephasing time due to the inhomogeneous broadening (T2∗). The spin dephasing time excluding the inhomogeneous broadening effect (T2) is measured by the inverse width of ultra-narrow hole-burning resonances in fifth-order differential transmission spectra.
@article{arxiv.cond-mat/0610075,
title = {Theory of nonlinear optical spectroscopy of electron spin coherence in quantum dots},
author = {Ren-Bao Liu and S. E. Economou and L. J. Sham and D. G. Steel},
journal= {arXiv preprint arXiv:cond-mat/0610075},
year = {2009}
}