We demonstrate that at all pressures, the resonant scattering emission in ${\mathrm{I}}_{2}$ vapor as excited by a 501.7-nm Ar-ion laser line is dominated by the combined effects of discrete-state resonant fluorescence and dissociative-state continuum resonant Raman scattering (RRS). The changes in the emission upon increased pressures, such as relative and absolute intensities of Stokes overtones, and the variation in depolarization ratios are demonstrated to be due to the gradual quenching of the resonance fluorescence at high pressure, while the dissociative-state RRS contribution remains unaltered.We demonstrate that at all pressures, the resonant scattering emission in ${\mathrm{I}}_{2}$ vapor as excited by a 501.7-nm Ar-ion laser line is dominated by the combined effects of discrete-state resonant fluorescence and dissociative-state continuum resonant Raman scattering (RRS). The changes in the emission upon increased pressures, such as relative and absolute intensities of Stokes overtones, and the variation in depolarization ratios are demonstrated to be due to the gradual quenching of the resonance fluorescence at high pressure, while the dissociative-state RRS contribution remains unaltered.

Physical Review AJun 1, 197412 citations

Resonance Fluorescence of Two-Level Atoms

H. Walther

Advances in atomic, molecular, and optical physicsJan 1, 20054 citations

Tunable two-mode and single-mode squeezing in resonance fluorescence, including phase-diffusion effects

Peng Zhou, S. Swain

The quadrature squeezing spectra produced in the resonance fluorescence of a two-level atom are investigated, including the effects of a finite laser bandwidth due to phase diffusion. For resonant excitation at low intensities, the fluorescence field exhibits narrow bandwidth squeezing in the out-of-phase quadrature, centered at the laser frequency. Otherwise, squeezing occurs only in the in-phase quadrature. Specifically, for slightly off-resonance and weak excitation, the squeezing still centers at the laser frequency, with a finite bandwidth of the order of $\ensuremath{\gamma}.$ More importantly, for far-off-resonance and strong excitation, the resonance fluorescence exhibits two-mode squeezing around the Rabi sideband frequencies. Thus we have a source of two-mode squeezing that is very easily frequency tuned simply by adjusting the generalized Rabi frequency. The presence of a laser linewidth substantially reduces the degree of squeezing obtainable. The fluorescence shows no squeezing at all when the laser linewidth is greater than the atomic spontaneous emission linewidth.The quadrature squeezing spectra produced in the resonance fluorescence of a two-level atom are investigated, including the effects of a finite laser bandwidth due to phase diffusion. For resonant excitation at low intensities, the fluorescence field exhibits narrow bandwidth squeezing in the out-of-phase quadrature, centered at the laser frequency. Otherwise, squeezing occurs only in the in-phase quadrature. Specifically, for slightly off-resonance and weak excitation, the squeezing still centers at the laser frequency, with a finite bandwidth of the order of $\ensuremath{\gamma}.$ More importantly, for far-off-resonance and strong excitation, the resonance fluorescence exhibits two-mode squeezing around the Rabi sideband frequencies. Thus we have a source of two-mode squeezing that is very easily frequency tuned simply by adjusting the generalized Rabi frequency. The presence of a laser linewidth substantially reduces the degree of squeezing obtainable. The fluorescence shows no squeezing at all when the laser linewidth is greater than the atomic spontaneous emission linewidth.

Physical Review AJan 1, 199923 citations

Resonance Fluorescence of Atoms in Strong Monochromatic Laser Fields

James D. Cresser, J. Häger, Gerd Leuchs +2 more

Topics in current physicsJan 1, 198247 citations

Resonance fluorescence of a single ion

J. T. Höffges, H. W. Baldauf, T. Eichler +2 more

Springer eBooksApr 7, 20085 citations

Resonant Raman Scattering or Resonance Fluorescence in I2 Vapor?

R. L. St. Peters, Seth D. Silverstein, M. Lapp +1 more

An examination of the foreign-gas pressure dependence of the intensity and spectrum of the signal from ${\mathrm{I}}_{2}$ vapor under off-resonance monochromatic excitation indicates that the re-emission process is not resonance Raman scattering as recently reported by Fouche and Chang.An examination of the foreign-gas pressure dependence of the intensity and spectrum of the signal from ${\mathrm{I}}_{2}$ vapor under off-resonance monochromatic excitation indicates that the re-emission process is not resonance Raman scattering as recently reported by Fouche and Chang.

Physical Review LettersFeb 5, 197337 citations

We demonstrate that at all pressures, the resonant scattering emission in

{\mathrm{I}}_{2}

vapor as excited by a 501.7-nm Ar-ion laser line is dominated by the combined effects of discrete-state resonant fluorescence and dissociative-state continuum resonant Raman scattering (RRS). The changes in the emission upon increased pressures, such as relative and absolute intensities of Stokes overtones, and the variation in depolarization ratios are demonstrated to be due to the gradual quenching of the resonance fluorescence at high pressure, while the dissociative-state RRS contribution remains unaltered.

An examination of the foreign-gas pressure dependence of the intensity and spectrum of the signal from

{\mathrm{I}}_{2}

vapor under off-resonance monochromatic excitation indicates that the re-emission process is not resonance Raman scattering as recently reported by Fouche and Chang.