Time delay of resonance fluorescence and spontaneous emission

Serge Reynaud, Jean Dalibard, Claude N. Cohen-Tannoudji

The statistics of spontaneous photon emission times in single atom resonance fluorescence are investigated through the radiative cascade of the dressed atom. The delay function which gives the distribution of the delays between two successive emissions is calculated for a coherent as well as an incoherent laser excitation. For a two-level atom, various signals that reflect the fluorescence intensity (average value, photon counting, fluctuation spectrum, etc.) are reviewed by this method. For a three-level atom, this approach is applied to the analysis of the recently observed phenomenon of intermittent fluorescence and quantum jumps.>

Harry J. Kimble, L. Mandeļ

Z Chen, Helen S. Freedhoff

The Heitler-Ma equation is adapted so that it can deal with two-photon spontaneous emission and resonance fluorescence processes. The authors introduce two types of effective Hamiltonian, depending on whether all the intermediate states are non-resonant or one of them is resonant. The spectra for spontaneous emission, and for resonance fluorescence in both weak and strong excitation fields, are discussed.

Thomas J. Mcilrath, Thomas J. McGee

Tran Quang, L. H. Lan, A.S. Shumovsky

H. M. Castro-Beltrán, R. Román-Ancheyta

We obtain time-resolved spectra of spontaneous emission and resonance fluorescence of a single multilevel emitter where two antiparallel transitions interfere and cause quantum beats. After rising as a single broad peak, the spontaneous emission spectrum turns into a doublet of subnatural peaks and then fades for long times. For strong field resonance fluorescence, the beat signature is the formation of doublet sidebands, which initially grow asymmetrically but end up symmetrical. We stress the filter bandwidth's crucial role in the spectral resolution and causal evolution.