Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physical Review Letters

Direct observation of the influence of Doppler-induced resonances on atomic velocities

N. P. Bigelow, Mara Goff Prentiss

Published Jul 30, 1990• 32 citations
Publisher

Abstract

We report the first direct observation of the effect of Doppleron resonances on the velocity distribution of atoms in an intense optical standing wave. These observations are in reasonable agreement with the simulations based on a continued-fraction solution for the force.
DOI
10.1103/physrevlett.65.555

Related papers

Observation of velocity-tuned multiphoton ‘‘Doppleron’’ resonances in laser-cooled atoms

J. J. Tollett, J. Chen, J. G. Story +3 more

An atomic beam of Li was transversely cooled using an intense standing-wave radiation field. A dramatic change in the transverse velocity distribution was observed. Structure in the resulting velocity distribution was found to be due to velocity-tuned multiphoton ``Doppleron'' resonances. The force due to seven-photon resonances is clearly resolved in the data. The data are in good agreement with theoretical predictions.

Physical Review Letters•Jul 30, 1990•40 citations

The force on an atom moving in an intense standing wave

J. J. Tollett

Atoms moving in an intense, near resonant standing wave (SW) experience a force along the direction of the SW. This force has been investigated by observing its effect on the transverse velocities of atoms in a thermal beam. When the standing wave is tuned above resonance the atomic beam is collimated and has an increased intensity at the center of the beam. Below resonance, the SW anti-collimates the atomic beam, reducing the central intensity. These effects are due to the interaction between the induced atomic dipole and the inhomogeneous field of the SW. Further investigation shows structure in the transverse velocity distribution of the atomic beam. This structure is due to multiphoton (Doppleron) resonances in the force. Calculations reproduce the dipole force and multiphoton resonance effects and are in good agreement with the data.

•Jan 1, 1991•0 citations

Direct observation of the Doppleron resonances in the force on a neutral atom in an optical standing wave

N. P. Bigelow, Mara Goff Prentiss

•May 21, 1990•0 citations

Doppleron-catalyzed Bragg resonances in atom optics

Scott Alan Glasgow, Pierre Meystre, Martin Wilkens

A novel scheme to achieve large-angle atomic diffraction by standing-wave fields is proposed. It uses a highorder Doppleron resonance as a catalyst to speed up a high-order Bragg resonance by orders of magnitude. This effect occurs when the atom-field frequency detuning is such that the Bragg resonance and the Doppleron resonance become degenerate.

Optics Letters•Sep 15, 1992•0 citations

Raman emission versus dopplerons in a two-level atomic cell

Andree A. Tallet

Dopplerons are the signature of the nonlinear response of moving atoms driven by a continuous standing-wave laser beam. They display maxima on the velocity-dependent atomic population difference at velocities nearly equal to ±(c/ω)[(δ(ω2 + 2Ω2)1/2/(2p + 1)], where Ω is the Rabi frequency associated with an individual beam field and δω is the detuning between the driving frequency and the center of the Doppler linewidth. Probing the device with a weak signal yields gain for Doppler broadenings of the magnitude of the detuning, exclusively on the atomic-resonance-frequency side, with a maximum shifted from the driving frequency by the generalized Rabi frequency associated with a standing wave, defined by (δω2 + 4Ω2)1/2. The existence of dopplerons is demonstrated by peaks occurring at frequencies shifted from the driving frequency by even harmonics of doppleron frequencies. The intensity of the peaks is shown to depend on the Doppler width, and the complexity of the gain curve is shown to increase as the pump intensity does.

Journal of the Optical Society of America B•Aug 1, 1994•5 citations

Velocity-tuned resonances in atomic diffraction by a standing-wave light field.

Scott Alan Glasgow

Multi-photon Doppleron resonances are investigated for the diffraction of atoms by a classical standing-wave optical field in the regime where energy conservation limits the diffraction orders. In this regime, atomic recoil is incorporated into the description, and consideration of the dynamical shift of the resonance condition from the purely kinematic results becomes critical to observing the desired diffraction of the atomic wave function. Special attention is given to the development of a technique for evaluating the resonances which constitutes a significant simplification of the usual degenerate perturbation theory approach for a quantum-mechanical Hamiltonian. Also developed is a specialized off-resonant atom-field interaction which is shown to be maximally efficient at producing high-order diffraction of the atomic wave function. Suggestions for its implementation are given.

•Jan 1, 1993•0 citations
Atoms moving in an intense, near resonant standing wave (SW) experience a force along the direction of the SW. This force has been investigated by observing its effect on the transverse velocities of atoms in a thermal beam. When the standing wave is tuned above resonance the atomic beam is collimated and has an increased intensity at the center of the beam. Below resonance, the SW anti-collimates the atomic beam, reducing the central intensity. These effects are due to the interaction between the induced atomic dipole and the inhomogeneous field of the SW. Further investigation shows structure in the transverse velocity distribution of the atomic beam. This structure is due to multiphoton (Doppleron) resonances in the force. Calculations reproduce the dipole force and multiphoton resonance effects and are in good agreement with the data.
Dopplerons are the signature of the nonlinear response of moving atoms driven by a continuous standing-wave laser beam. They display maxima on the velocity-dependent atomic population difference at velocities nearly equal to ±(c/ω)[(δ(ω2 + 2Ω2)1/2/(2p + 1)], where Ω is the Rabi frequency associated with an individual beam field and δω is the detuning between the driving frequency and the center of the Doppler linewidth. Probing the device with a weak signal yields gain for Doppler broadenings of the magnitude of the detuning, exclusively on the atomic-resonance-frequency side, with a maximum shifted from the driving frequency by the generalized Rabi frequency associated with a standing wave, defined by (δω2 + 4Ω2)1/2. The existence of dopplerons is demonstrated by peaks occurring at frequencies shifted from the driving frequency by even harmonics of doppleron frequencies. The intensity of the peaks is shown to depend on the Doppler width, and the complexity of the gain curve is shown to increase as the pump intensity does.
Multi-photon Doppleron resonances are investigated for the diffraction of atoms by a classical standing-wave optical field in the regime where energy conservation limits the diffraction orders. In this regime, atomic recoil is incorporated into the description, and consideration of the dynamical shift of the resonance condition from the purely kinematic results becomes critical to observing the desired diffraction of the atomic wave function. Special attention is given to the development of a technique for evaluating the resonances which constitutes a significant simplification of the usual degenerate perturbation theory approach for a quantum-mechanical Hamiltonian. Also developed is a specialized off-resonant atom-field interaction which is shown to be maximally efficient at producing high-order diffraction of the atomic wave function. Suggestions for its implementation are given.