Spectral asymmetries in the resonance fluorescence of two-level systems under pulsed excitation

摘要

We present an open-system master equation study of the coherent andincoherent resonance fluorescence spectrum from a two-level quantum systemunder coherent pulsed excitation. Several pronounced features which differ fromthe fluorescence under a constant drive are highlighted, including a multi-peakstructure and a pronounced off-resonant spectral asymmetry, in stark contrastto the conventional symmetrical Mollow triplet. We also study semiconductorquantum dot systems using a polaron master equation, and show how the keyfeatures of dynamic resonance fluorescence change withelectron--acoustic-phonon coupling.