Optical pressure on atoms in a field of counterpropagating amplitude- and frequency-modulated waves which are in resonance with an atomic transition

Voitsekhovich, V. S.; Danileiko, M. V.; Negriiko, A. M.; Romanenko, V. I.; Yatsenko, L. P.

doi:10.1070/qe1991v021n09abeh004059

Cited by 6 publications

(9 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The use of counterpropagating amplitude-modulated light waves, leading to a stimulated light pressure on atoms, has been proposed as a viable method to achieve large force magnitudes F F rad over a wide velocity range v ⊥ Γ sp /k [34,35]. While the magnitude of the stimulated bichromatic force (BCF) can be explained using an intuitive resonant optical π-pulse interpretation [35,36], an understanding of the large velocity capture range requires a doubly-dressed atom picture [37]. In the simplest case, a two-level system interacts with collinearly superimposed bichromatic standing waves with equal intensities I BCF and symmetrically detuned by ±|δ Γ sp | from atomic resonance.…”

Section: B Coherent Optical Forcesmentioning

confidence: 99%

Large molasses-like cooling forces for molecules using polychromatic optical fields: A theoretical description

Wenz,

Kozyryev,

McNally

et al. 2020

Preprint

View full text Add to dashboard Cite

Recent theoretical investigations have indicated that rapid optical cycling should be feasible in complex polyatomic molecules with diverse constituents, geometries and symmetries. However, as a composite molecular mass grows, so does the required number of photon scattering events necessary to decelerate and confine molecular beams using laser light. Utilizing coherent momentum exchange between light fields and molecules can suppress spontaneous emission and significantly reduce experimental complexity for slowing and trapping. Working with BaH as a test species, we have identified a robust, experimentally viable configuration to achieve large molasses-like cooling forces for molecules using polychromatic optical fields addressing both X − A and X − B electronic transitions, simultaneously. Using numerical solutions of the time-dependent density matrix as well as Monte Carlo simulations, we demonstrate that creation of Suppressed Emission Rate (SupER) molasses with large capture velocities (∼ 40 m/s) is generically feasible for polyatomic molecules of increasing complexity that have an optical cycling center. Proposed SupER molasses are anticipated to not only extend quantum control to novel molecular species with abundant vibrational decay channels, but also significantly increase trapped densities for previously laser-cooled diatomic and triatomic species.

show abstract

Section: B Coherent Optical Forcesmentioning

confidence: 99%

Large molasses-like cooling forces for molecules using polychromatic optical fields: A theoretical description

Wenz,

Kozyryev,

McNally

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…The idea of the pulse trap based on the counterpropagating pulse trains [5] stems from Kazantsev's analysis [8] of the atomic motion in the field of the counterpropagating π -pulse trains, advanced in [6,9]. Let the train of the π -pulses propagate in a z direction with the repetition period T and the other train of the π -pulses propagate in the opposite direction (see figure 1).…”

Section: The Simple Model Of the Pulse Trap Based On The Counterpropa...mentioning

confidence: 99%

“…This simple physical consideration is valid for the quite large spontaneous emission rate γ = 1/τ sp , namely for γ 1/T . The detailed analysis [6,9] shows that the force exerted on an atom in the field of the counterpropagating πpulse trains with the high repetition rate of the pulses,…”

Section: The Simple Model Of the Pulse Trap Based On The Counterpropa...mentioning

confidence: 99%

Theory of one-dimensional trapping of atoms by counterpropagating short pulse trains

Romanenko¹,

Yatsenko²

2011

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

We have developed a theory of the one-dimensional atomic trap formed by the resonant counterpropagating trains of the short small-area laser pulses. Atoms are trapped in the region where the counterpropagating pulses 'collide'. We have derived the effective Hamiltonian which allows us to consider an atom in the polychromatic field of the pulse trains as the atom with the spatially modulated transition frequency in a standing monochromatic wave. We have obtained the expressions for the coordinate-dependent force exerted on the atom and the atom potential energy. The value of the potential barrier for typical femtosecond laser parameters for an atom with mass ∼100 amu is approximately 15 mK.

show abstract

“…1) and point C is the point where the counterpropagating pulses collide. We assume that an atom at point A is in the ground state before the recent interaction with pulse R (this is true in most cases because of the short time between the interaction of the atom with R and L pulses in comparison with the time between the interaction with R and R pulses [22]). As a result of the interaction with this pulse, the atom absorbs a photon and becomes excited.…”

Section: Introductionmentioning

confidence: 99%

Cooling and trapping of atoms and molecules by counterpropagating pulse trains

et al. 2014

View full text Add to dashboard Cite

We discuss a possible one-dimensional trapping and cooling of atoms and molecules due to their nonresonant interaction with counterpropagating light pulse trains. The counterpropagating pulses form a one-dimensional trap for atoms and molecules and a properly chosen carrier frequency detuning from the transition frequency of the atoms or molecules keeps the temperature of the atomic or molecular ensemble close to the Doppler cooling limit. The calculation by the Monte Carlo wave-function method is carried out for the two-level and three-level schemes of the atom's and the molecule's interaction with the field, respectively. The models discussed are applicable to atoms and molecules with almost diagonal Frank-Condon factor arrays. Illustrative calculations are carried out for ensemble-averaged characteristics for sodium atoms and SrF molecules in the trap. The potential for the nanoparticle light pulses's trap formed by counterpropagating light pulse trains is also discussed.

show abstract

Optical pressure on atoms in a field of counterpropagating amplitude- and frequency-modulated waves which are in resonance with an atomic transition

Cited by 6 publications

References 1 publication

Large molasses-like cooling forces for molecules using polychromatic optical fields: A theoretical description

Large molasses-like cooling forces for molecules using polychromatic optical fields: A theoretical description

Theory of one-dimensional trapping of atoms by counterpropagating short pulse trains

Cooling and trapping of atoms and molecules by counterpropagating pulse trains

Contact Info

Product

Resources

About