Étude du pompage optique dans le formalisme de la matrice densité

Barrat, J.P.; Cohen‐Tannoudji, Claude

doi:10.1051/jphysrad:01961002206032900

Cited by 207 publications

(81 citation statements)

References 4 publications

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“…When the density matrix for the final state was calculated, we obtained the fluorescence intensities with a specific polarization along the unit vector e as [23,26,27]:…”

Section: Laser Radiation Fluctuationsmentioning

confidence: 99%

Electric field induced hyperfine level-crossings in (nD)Cs at two-step laser excitation: Experiment and theory

Auzinsh

Blushs

Ferber

et al. 2006

Optics Communications

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The pure electric field level-crossing of mF Zeeman sublevels of hyperfine F levels at two-step laser excitation was described theoretically and studied experimentally for the nD 3/2 states in Cs with n = 7, 9 and 10, by applying a diode laser in the first 6S 1/2 → 6P 3/2 step and a diode or dye laser for the second 6P 3/2 → nD 3/2 step. Level-crossing resonance signals were observed in the nD 3/2 → 6P 1/2 fluorescence. A theoretical model was developed to describe quantitatively the resonance signals by correlation analysis of the optical Bloch equations in the case when an atom simultaneously interacts with two laser fields in the presence of an external dc electric field. The simulations described well the experimental signals. The tensor polarizabilities α2 (in a 3 0 ) were determined to be 7.45(20) × 10 4 for the 7D 3/2 state and 1.183(35) × 10 6 for the 9D 3/2 state; a well established α2 value for 10D 3/2 was used to calibrate the electric field. The α2 value for the 7D 3/2 state differed by ca. 15% from the existing experimentally measured value.

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“…When the density matrix for the final state was calculated, we obtained the fluorescence intensities with a specific polarization along the unit vector e as [23,26,27]:…”

Section: Laser Radiation Fluctuationsmentioning

confidence: 99%

Electric field induced hyperfine level-crossings in (nD)Cs at two-step laser excitation: Experiment and theory

Auzinsh

Blushs

Ferber

et al. 2006

Optics Communications

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“…This is the case for experiments using buffer-gas or antirelaxation-coated vapor cells, in which atoms undergo frequent velocity-changing collisions during the ground-state polarization lifetime. The consequences of the complete mixing approximation are similar to those of the broad-line approximation [30,31,32,33], which takes the spectrum of the pump light to be broader than the Doppler width of the ensemble. In the completemixing case, narrow-band light produces polarization in a single velocity group in the Doppler distribution, and the polarization is averaged over all velocity groups through rethermalization, while in the broad-line case, the entire Doppler distribution is pumped directly.…”

Section: Totally Unresolved Ground-or Excited-state Hyperfine Strmentioning

confidence: 69%

Light-induced polarization effects in atoms with partially resolved hyperfine structure and applications to absorption, fluorescence, and nonlinear magneto-optical rotation

2009

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The creation and detection of atomic polarization is examined theoretically, through the study of basic optical-pumping mechanisms and absorption and fluorescence measurements, and the dependence of these processes on the size of ground-and excited-state hyperfine splittings is determined. The consequences of this dependence are studied in more detail for the case of nonlinear magnetooptical rotation in the Faraday geometry (an effect requiring the creation and detection of rank-two polarization in the ground state) with alkali atoms. Analytic formulas for the optical rotation signal under various experimental conditions are presented.

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“…Coherences p~j between the ground state sublevels experience light shift and damping effects [ 2,15 ]:…”

Section: Kipii( T ) (5) B(t) = -K~p~(t) +~ ~=mentioning

confidence: 99%

“…In general, light shift effects contain also contributions corresponding to electric quadrupole fields [2]. However, since we have neglected the hyperfine splitting of the excited state, these effects do not appear in this system.…”

Section: Kipii( T ) (5) B(t) = -K~p~(t) +~ ~=mentioning

confidence: 99%

“…If the interaction excites such states in the electronic ground state, they can have a very long lifetime and the corresponding media tend therefore to exhibit highly nonlinear optical properties even at low laser intensities. The exchange of angular momentum between photons and atoms not only creates these anisotropic states, but also leads to "displacement and broadening of magnetic resonance transitions", effects which were first observed and explained by Barrat and Cohen-Tannoudji [2 ]. The interaction with the light thus drives the system away from its equilibrium position and thereby affects the way in which the medium interacts with its environment.…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Laser induced dynamics of atomic sublevel coherences

Suter

Marty

1993

Optics Communications

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Étude du pompage optique dans le formalisme de la matrice densité

Abstract: To cite this version:J.P. Barrat, C. Cohen-Tannoudji. Étude du pompage optique dans le formalisme de la matrice densité. J. Phys. Radium, 1961, 22 (6)

Cited by 207 publications

References 4 publications

Electric field induced hyperfine level-crossings in (nD)Cs at two-step laser excitation: Experiment and theory

Electric field induced hyperfine level-crossings in (nD)Cs at two-step laser excitation: Experiment and theory

Light-induced polarization effects in atoms with partially resolved hyperfine structure and applications to absorption, fluorescence, and nonlinear magneto-optical rotation

Laser induced dynamics of atomic sublevel coherences

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