Luminescence intensity autocorrelation (LIA) is employed to investigate coupling dynamics between (In,Ga)As QDs and a high-Q (~7000) resonator with ultrafast time resolution (150 fs), below and above the lasing threshold at T = 5 K. For QDs resonant and non-resonant with the cavity we observe both a six-fold enhancement and a 0.77 times reduction of the spontaneous emission rate, respectively. In addition, LIA spectroscopy reveals the onset of coherent coupling at the lasing threshold through qualitative changes in the dynamic behavior and a tripling of the resonant QD emission rate.
@article{arxiv.cond-mat/0206065,
title = {Coherent coupling dynamics in a quantum dot microdisk laser},
author = {D. K. Young and L. Zhang and D. D. Awschalom and E. L. Hu},
journal= {arXiv preprint arXiv:cond-mat/0206065},
year = {2009}
}
Comments
Accepted for publication, Phys. Rev. B Rapid Communications, 11 pages, 4 figures