Double dark resonances originate from a coherent perturbation of a system displaying electromagnetically induced transparency. We experimentally show and theoretically confirm that this leads to the possibility of extremely sharp resonances prevailing even in the presence of considerable Doppler broadening. A gas of ${}^{87}\mathrm{Rb}$ atoms is subjected to a strong drive laser and a weak probe laser and a radio frequency field, where the magnetic coupling between the Zeeman levels leads to nonlinear generation of a comb of sidebands.Double dark resonances originate from a coherent perturbation of a system displaying electromagnetically induced transparency. We experimentally show and theoretically confirm that this leads to the possibility of extremely sharp resonances prevailing even in the presence of considerable Doppler broadening. A gas of ${}^{87}\mathrm{Rb}$ atoms is subjected to a strong drive laser and a weak probe laser and a radio frequency field, where the magnetic coupling between the Zeeman levels leads to nonlinear generation of a comb of sidebands.

arXiv:quant-ph/0306147Physical Review ADec 2, 2003107 citations

Narrow Resonances Induced in an Absorbing Gas by an Intense Light Field

Vladilen S Letokhov

Jan 1, 19730 citations

Theory of Nonlinear Optical Resonances Induced by Collisions

G. Grynberg

Springer series in optical sciences/SPringer series in optical sciencesJan 1, 19812 citations

Observation of narrow Autler-Townes components in the resonant response of a dense atomic gas

Vladimir A. Sautenkov, Yuri V. Rostovtsev, E. R. Eliel

We have experimentally studied the reflection of a weak probe beam from a dense atomic potassium vapor in the presence of a strong laser field tuned to the atomic resonance transition. We have observed an Autler-Townes doublet under hitherto unexplored conditions, namely, that the Rabi frequency induced by the strong laser field is much smaller than the self-broadened width of the resonance transition of the unexcited vapor. We attribute our observation to a reduction of the atomic decoherence by the strong drive field. We present a theoretical model of nonlinear processes in a dense atomic gas to explain the observed results.We have experimentally studied the reflection of a weak probe beam from a dense atomic potassium vapor in the presence of a strong laser field tuned to the atomic resonance transition. We have observed an Autler-Townes doublet under hitherto unexplored conditions, namely, that the Rabi frequency induced by the strong laser field is much smaller than the self-broadened width of the resonance transition of the unexcited vapor. We attribute our observation to a reduction of the atomic decoherence by the strong drive field. We present a theoretical model of nonlinear processes in a dense atomic gas to explain the observed results.

arXiv:0804.4151Physical Review AJul 1, 200823 citations

Two-color optical nonlinearity in an ultracold Rydberg atom gas mixture

Cheng Chen, Fan Yang, Xiaoling Wu +3 more

We report the experimental observation of strong two-color optical nonlinearity in an ultracold gas of $^{85}\mathrm{Rb}\text{\ensuremath{-}}^{87}\mathrm{Rb}$ atom mixture. By simultaneously coupling two probe transitions of $^{85}\mathrm{Rb}$ and $^{87}\mathrm{Rb}$ atoms to Rydberg states in electromagnetically induced transparency (EIT) configurations, we observe significant suppression of the transparency resonance for one probe field when the second probe field is detuned at $\ensuremath{\sim}1\phantom{\rule{3.33333pt}{0ex}}\mathrm{GHz}$ and hitting the EIT resonance of the other isotope. Such a cross-absorption modulation to the beam propagation dynamics can be described by two coupled nonlinear wave equations we develop. We further demonstrate that the two-color optical nonlinearity can be tuned by varying the density ratio of different atomic isotopes, which highlights its potential for exploring strongly interacting multicomponent fluids of light.We report the experimental observation of strong two-color optical nonlinearity in an ultracold gas of $^{85}\mathrm{Rb}\text{\ensuremath{-}}^{87}\mathrm{Rb}$ atom mixture. By simultaneously coupling two probe transitions of $^{85}\mathrm{Rb}$ and $^{87}\mathrm{Rb}$ atoms to Rydberg states in electromagnetically induced transparency (EIT) configurations, we observe significant suppression of the transparency resonance for one probe field when the second probe field is detuned at $\ensuremath{\sim}1\phantom{\rule{3.33333pt}{0ex}}\mathrm{GHz}$ and hitting the EIT resonance of the other isotope. Such a cross-absorption modulation to the beam propagation dynamics can be described by two coupled nonlinear wave equations we develop. We further demonstrate that the two-color optical nonlinearity can be tuned by varying the density ratio of different atomic isotopes, which highlights its potential for exploring strongly interacting multicomponent fluids of light.

arXiv:2104.08873Physical Review AMay 4, 202112 citations

Resonant Strong Field Nonlinear Optical Interactions

David A. Coppeta

Jan 1, 19960 citations

{}^{87}\mathrm{Rb}

atoms is subjected to a strong drive laser and a weak probe laser and a radio frequency field, where the magnetic coupling between the Zeeman levels leads to nonlinear generation of a comb of sidebands.

^{85}\mathrm{Rb}

and

^{87}\mathrm{Rb}

atoms to Rydberg states in electromagnetically induced transparency (EIT) configurations, we observe significant suppression of the transparency resonance for one probe field when the second probe field is detuned at $\ensuremath{\sim}1\phantom{\rule{3.33333pt}{0ex}}\mathrm{GHz}$ and hitting the EIT resonance of the other isotope. Such a cross-absorption modulation to the beam propagation dynamics can be described by two coupled nonlinear wave equations we develop. We further demonstrate that the two-color optical nonlinearity can be tuned by varying the density ratio of different atomic isotopes, which highlights its potential for exploring strongly interacting multicomponent fluids of light.