Nonlinear effects in optical pumping of a cold and slow atomic beam

N. Porfido, N. N. Bezuglov, M. Bruvelis, G. Shayeganrad, S. Birindelli, F. Tantussi, I. Guerri, M. Viteau, A. Fioretti, D. Ciampini, M. Allegrini, D. Comparat, E. Arimondo, A. Ekers, F. Fuso

Research output

6 Citations (Scopus)

Abstract

By photoionizing hyperfine (HF) levels of the Cs state 6 2 P 3/2 in a slow and cold atom beam, we find how their population depends on the excitation laser power. The long time (around 180 μs) spent by the slow atoms inside the resonant laser beam is large enough to enable xploration of a unique atom-light interaction regime heavily affected by time-dependent optical pumping. We demonstrate that, under such conditions, the onset of nonlinear effects in the population dynamics and optical pumping occurs at excitation laser intensities much smaller than the conventional respective saturation values. The evolution of opulation within the HF structure is calculated by numerical integration of the multilevel optical Bloch equations. The agreement between numerical results and experiment outcomes is excellent. All main features in the experimental findings are explained by the occurrence of “dark” and “bright” resonances leading to power-dependent branching coefficients.
Original languageEnglish
Number of pages11
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume92
DOIs
Publication statusPublished - 2015

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atomic beams
optical pumping
atoms
hyperfine structure
numerical integration
excitation
lasers
pumping
laser beams
occurrences
saturation
coefficients
interactions

Cite this

Porfido, N. ; Bezuglov, N. N. ; Bruvelis, M. ; Shayeganrad, G. ; Birindelli, S. ; Tantussi, F. ; Guerri, I. ; Viteau, M. ; Fioretti, A. ; Ciampini, D. ; Allegrini, M. ; Comparat, D. ; Arimondo, E. ; Ekers, A. ; Fuso, F. / Nonlinear effects in optical pumping of a cold and slow atomic beam. In: Physical Review A - Atomic, Molecular, and Optical Physics. 2015 ; Vol. 92.
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title = "Nonlinear effects in optical pumping of a cold and slow atomic beam",
abstract = "By photoionizing hyperfine (HF) levels of the Cs state 6 2 P 3/2 in a slow and cold atom beam, we find how their population depends on the excitation laser power. The long time (around 180 μs) spent by the slow atoms inside the resonant laser beam is large enough to enable xploration of a unique atom-light interaction regime heavily affected by time-dependent optical pumping. We demonstrate that, under such conditions, the onset of nonlinear effects in the population dynamics and optical pumping occurs at excitation laser intensities much smaller than the conventional respective saturation values. The evolution of opulation within the HF structure is calculated by numerical integration of the multilevel optical Bloch equations. The agreement between numerical results and experiment outcomes is excellent. All main features in the experimental findings are explained by the occurrence of “dark” and “bright” resonances leading to power-dependent branching coefficients.",
author = "N. Porfido and Bezuglov, {N. N.} and M. Bruvelis and G. Shayeganrad and S. Birindelli and F. Tantussi and I. Guerri and M. Viteau and A. Fioretti and D. Ciampini and M. Allegrini and D. Comparat and E. Arimondo and A. Ekers and F. Fuso",
year = "2015",
doi = "10.1103/PhysRevA.92.043408",
language = "English",
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journal = "Physical Review A - Atomic, Molecular, and Optical Physics",
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Porfido, N, Bezuglov, NN, Bruvelis, M, Shayeganrad, G, Birindelli, S, Tantussi, F, Guerri, I, Viteau, M, Fioretti, A, Ciampini, D, Allegrini, M, Comparat, D, Arimondo, E, Ekers, A & Fuso, F 2015, 'Nonlinear effects in optical pumping of a cold and slow atomic beam', Physical Review A - Atomic, Molecular, and Optical Physics, vol. 92. https://doi.org/10.1103/PhysRevA.92.043408

Nonlinear effects in optical pumping of a cold and slow atomic beam. / Porfido, N.; Bezuglov, N. N.; Bruvelis, M.; Shayeganrad, G.; Birindelli, S.; Tantussi, F.; Guerri, I.; Viteau, M.; Fioretti, A.; Ciampini, D.; Allegrini, M.; Comparat, D.; Arimondo, E.; Ekers, A.; Fuso, F.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 92, 2015.

Research output

TY - JOUR

T1 - Nonlinear effects in optical pumping of a cold and slow atomic beam

AU - Porfido, N.

AU - Bezuglov, N. N.

AU - Bruvelis, M.

AU - Shayeganrad, G.

AU - Birindelli, S.

AU - Tantussi, F.

AU - Guerri, I.

AU - Viteau, M.

AU - Fioretti, A.

AU - Ciampini, D.

AU - Allegrini, M.

AU - Comparat, D.

AU - Arimondo, E.

AU - Ekers, A.

AU - Fuso, F.

PY - 2015

Y1 - 2015

N2 - By photoionizing hyperfine (HF) levels of the Cs state 6 2 P 3/2 in a slow and cold atom beam, we find how their population depends on the excitation laser power. The long time (around 180 μs) spent by the slow atoms inside the resonant laser beam is large enough to enable xploration of a unique atom-light interaction regime heavily affected by time-dependent optical pumping. We demonstrate that, under such conditions, the onset of nonlinear effects in the population dynamics and optical pumping occurs at excitation laser intensities much smaller than the conventional respective saturation values. The evolution of opulation within the HF structure is calculated by numerical integration of the multilevel optical Bloch equations. The agreement between numerical results and experiment outcomes is excellent. All main features in the experimental findings are explained by the occurrence of “dark” and “bright” resonances leading to power-dependent branching coefficients.

AB - By photoionizing hyperfine (HF) levels of the Cs state 6 2 P 3/2 in a slow and cold atom beam, we find how their population depends on the excitation laser power. The long time (around 180 μs) spent by the slow atoms inside the resonant laser beam is large enough to enable xploration of a unique atom-light interaction regime heavily affected by time-dependent optical pumping. We demonstrate that, under such conditions, the onset of nonlinear effects in the population dynamics and optical pumping occurs at excitation laser intensities much smaller than the conventional respective saturation values. The evolution of opulation within the HF structure is calculated by numerical integration of the multilevel optical Bloch equations. The agreement between numerical results and experiment outcomes is excellent. All main features in the experimental findings are explained by the occurrence of “dark” and “bright” resonances leading to power-dependent branching coefficients.

U2 - 10.1103/PhysRevA.92.043408

DO - 10.1103/PhysRevA.92.043408

M3 - Article

VL - 92

JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

SN - 1050-2947

ER -