Dynamically induced atomic resonance fluorescence and cavity transmission spectra in a driven Jaynes-Cummings system - art. no. 063814

Spectra of the atomic resonance fluorescence and of the cavity-transmitted light in a driven Jaynes-Cummings system are studied theoretically, where t he cavity is driven by a classical field of arbitrary strength. In the regi me of strong atom-cavity coupling, anomalous resonance peaks occur at +/- r oot ng' (n=2,3,...), with the modified vacuum Rabi frequency g', both in th e atomic fluorescence and the cavity transmission. These peaks as well as t he observed shift of the vacuum Rabi splitting are explained in terms of th e quasienergy levels induced dynamically by the strong driving field. For a stronger driving field, it is shown that the spectrum of the cavity transm ission deviates from that of the atomic fluorescence. In the presence of si gnificant damping, the spectrum of the cavity transmission approaches a sin glet structure in the strong driving-field limit, and it is found additiona lly that a bimodal photon-number distribution, which results in a unique qu intuplet spectrum of the atomic fluorescence, does not show up in the cavit y transmission.