Dara P. S. McCutcheon, Ahsan Nazir
We study the first order field correlation function and emission spectrum of a driven artificial atom. Focusing on the experimentally relevant example of a semiconductor quantum dot, we find that the solid-state (phonon) environment can have a profound effect on the emission characteristics of such a system. For resonant driving, we find an increase in the coherently emitted radiation field with increasing driving strength due to the quantum nature of the phonon bath. This feature is in stark contrast to the standard quantum optics treatment, which predicts a decrease in the fraction of coherent emission with increasing driving strength, and should be observable in experimentally achievable regimes. For off-resonant driving, we show how narrowing in the spectral sideband width can occur in certain regimes, consistent with a known experimental trend.
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http://arxiv.org/abs/1208.4620
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