Excitation dependence of resonance line self-broadening at different atomic densities

  title={Excitation dependence of resonance line self-broadening at different atomic densities},
  author={Hebin Li and Vladimir A. Sautenkov and Yuri V. Rostovtsev and Marlan O. Scully},
  journal={Journal of Physics B: Atomic, Molecular and Optical Physics},
We study the dipole–dipole spectral broadening of a resonance line at high atomic densities when the self-broadening dominates. The selective reflection spectrum of a weak probe beam from the interface of the cell window and rubidium vapour is recorded in the presence of a far-detuned pump beam. The excitation due to the pump reduces the self-broadening. We found that the self-broadening reduction dependence on the pump power is atomic density independent. These results provide experimental… 

Hyperfine dipole-dipole broadening of selective reflection spectroscopy at the gas-solid interface

We theoretically and experimentally investigate hyperfine dipole-dipole broadening in the selective reflection (SR) spectroscopy at the gas-solid interface with the atomic density of 1014–1015 cm−3.

Optical Resonant Saturation of Dipole–Dipole Broadened Transitions in High-Density Atomic Vapor

We discuss the experimental research of an optical resonant saturation of a dipole–dipole-broadened atomic transition in the high-density rubidium vapor. The dipole–dipole width of the selected

Line shapes of atomic transitions in excited dense gas

We discuss recently published results of experimental studies of dipole-dipole broadened line shapes in excited atomic vapors. The Lorentz local-field shift and self-broadened width were measured in

Kinetics and Optical Properties of the Strongly Driven Gas Medium of Interacting Atoms

This paper investigates stimulated emission and absorption near resonance for a driven system of interacting two-level atoms. Microscopic kinetic equations for the density matrix elements of N-atom

Cooperative interactions in dense thermal Rb vapour confined in nm-scale cells

This thesis presents an investigation of the fundamental interaction between light and matter, realised with a rubidium vapour confined in a cell whose thickness (in the propagation direction) is

Probing dipole-dipole interaction in a rubidium gas via double-quantum 2D spectroscopy.

This technique provides sensitive and background-free detection of the dipole-dipole interaction and a theoretical model based on the optical Bloch equations is used to reproduce the experimental spectrum and confirm the origin of doublequantum signals.

Optical Saturation of Strong Selective Reflection

Nonlinear selective reflection of obliquely incident laser beam (inclined geometry) has been investigated. The new structures were detected on the tops of strong reflection resonances under

Refractive index enhancement with vanishing absorption in short, high-density vapor cells

It has recently been predicted and experimentally demonstrated that the refractive index of a vapor may be enhanced while maintaining vanishing absorption by using the interference of two Raman

Long range dipole-dipole interaction in low-density atomic vapors probed by double-quantum two-dimensional coherent spectroscopy.

The experimental results confirm the long range nature of the dipole-dipole interaction, which is critical for understanding many-body physics in atoms/molecules and can open a new avenue to study long-range interactions in solid state systems such as quantum dots and color centers in diamonds.

Two-quantum resonances observed in potassium vapor by two-dimensional Fourier-transform spectroscopy

Unexpected two-quantum resonances are observed in potassium vapor using two-dimensional Fourier-transform spectroscopy. These transitions are an unambiguous indication of many-body interactions,



Improvement of spectral resolution by using the excitation dependence of dipole–dipole interaction in a dense atomic gas

We have studied the selective reflection from the interface between a dense rubidium (Rb) atomic vapor and a transparent dielectric. A remarkable narrowing of the spectrum, which can be used to

Dipole-Dipole Broadened Line Shape in a Partially Excited Dense Atomic Gas.

It is shown that the resonance line shape of a partially excited dense atomic rubidium vapor at a density where the binary collision approximation starts to break down is well represented by a simple expression for the dielectric function that includes an excitation-dependent linewidth and shift.

Shift and broadening in attenuated total reflection spectra of the hyperfine-structure-resolved D 2 line of dense rubidium vapor

We have observed attenuated total reflection at a glass/rubidium vapor interface in high precision. The atom density was from 3.8x10{sup 20} to 3.7x10{sup 21} m{sup -3} and the angle of incidence was

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

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

Ultrafast optical spectroscopy of spectral fluctuations in a dense atomic vapor.

Transient four-wave mixing experiments with 100 fs pulses in a dense potassium vapor probe the electronic energy fluctuations that lead to optical decoherence and show that the slow component is a many-body excitonic contribution arising from long-range resonant interactions.

Resonance interaction and self-broadening of alkali resonance lines. II. Quasi-static wing profiles

For pt.I see ibid., vol.10, no.3, p.2631 (1977). Calculates the oscillator strengths from the ground level to the first excited states of the long-range alkali homonuclear dimers. Using the known

The non-Lorentzian wings of alkali resonance lines: the determination of the atom number density in pure and mixed alkali vapours

The improved method for the determination of the atom number densities in pure and mixed alkali vapours has been proposed. In order to obtain the correct results one has to go beyond the simple

Measurement of the excitation dependence of the Lorentz local-field shift

The optical response function of dense matter is not trivially connected to the electromagnetic properties of the constituent particles because it is a many-body problem. More than a century ago an