Laser spectroscopy of the 5P3/2 → 6Pj (j = 1/2 and 3/2) electric dipole forbidden transitions in atomic rubidium

Ponciano-Ojeda, Francisco S.; Hernández-Gómez, Santiago; Mojica-Casique, Cristian; Hoyos, L. M.; Flores-Mijangos, J.; Ramírez-Martínez, F.; Sahagún, Daniel; Jáuregui, R.; Jiménez-Mier, J.

doi:10.1063/1.5031693

Cited by 4 publications

(18 citation statements)

References 20 publications

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“…In our experiment the atoms are first prepared in the 5p 3/2 excited state by an electric dipole transition, where the populations in the ¢ M F magnetic sublevels reach a stationary state. This is the same preparation step as used in our previous works on the 5p 3/2 →6p 3/2 forbidden transition [12,14,28]. A second laser, whose frequency is swept across several hundred MHz, pumps atoms in the 5p 3/2 excited state to the hyperfine F″ levels of the 6p 1/2 state.…”

Section: Methodsmentioning

confidence: 99%

Optical spectroscopy of the 5p_3/2→ 6p_1/2electric dipole-forbidden transition in atomic rubidium

Ponciano-Ojeda

Mojica-Casique

Hernández-Gómez

et al. 2019

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

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We present the first evidence of excitation of the 5p 3/2 → 6p 1/2 electric dipole-forbidden transition in atomic rubidium. The experiments were carried out in a rubidium vapor cell using Doppler-free optical-optical double-resonance spectroscopy with counter-propagating beams. A 5s 1/2 → 5p 3/2 electric dipole preparation step using a diode laser locked to the F = 3 → 4 cyclic transition of the D2 line in 85 Rb is used to prepare the atoms in the first excited state. This is then followed by the 5p 3/2 F 2 = 4 → 6p 1/2 F 3 dipole-forbidden excitation (λ ≈ 917.5 nm) to establish a two-photon ladder (Ξ) excitation scheme. Production of atoms in the 6p 1/2 excited state is verified by detection of the 421 nm fluorescence that results from direct decay into the 5s 1/2 ground state.The polarization dependence of the relative intensities of the lines of the decay fluorescence is also investigated. Experimental data for different polarization configurations of the light beams used in this two-photon spectroscopy are compared with the results of calculations that consider a strong atom-field coupling in the preparation step, followed by a weak electric quadrupole excitation and the blue fluorescence decay emission. Good agreement between experiment and this three-step model is found in the case of linear-linear polarizations.

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Section: Methodsmentioning

confidence: 99%

Optical spectroscopy of the 5p_3/2→ 6p_1/2electric dipole-forbidden transition in atomic rubidium

Ponciano-Ojeda

Mojica-Casique

Hernández-Gómez

et al. 2019

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

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“…A second laser is then tuned to excite the electric quadrupole transition. This forbidden transition was first reported in [5], where it was shown that the hyperfine structure of the 6P 3/2 state could be resolved, and also that optical pumping and selection of velocity effects determined the overall structure of the electric dipole forbidden spectra. A three-step description was also proposed, which takes advantage of the large disparity in intensities between the strong preparation step and the weak electric quadrupole excitation.…”

Section: Introductionmentioning

confidence: 56%

“…A three-level atom description of the interaction between the two radiation fields and an atom is used as the starting point of the calculations [5,6]. This model considers that the coupling between the 5P and 6P states by the forbidden transition is very weak.…”

Section: The 5p 3/2 → 6p J (J = 3/2 1/2) Electric Quadrupole Transiti...mentioning

confidence: 99%

“…Therefore, in Figure 1b their hyperfine structure is presented. For the experiments with room-temperature atoms [5][6][7][8][9], the preparation laser selects the value of the total angular momentum F 1 of the ground state. The hyperfine structure and the selection rules for electric dipole transitions determine the characteristics of the 5S → 5P 3/2 preparation step.…”

Section: The 5p 3/2 → 6p J (J = 3/2 1/2) Electric Quadrupole Transiti...mentioning

confidence: 99%

“…Alkali atoms, with a simple electronic structure, are naturally a good testing ground in the experimental and theoretical study of electromagnetic transitions beyond the electric dipole approximation. Examples of experiments to observe such transitions in roomtemperature or hot vapors of alkali atoms include the study of s to d excitations [1][2][3], and also of the relatively strong p to p transitions in rubidium [4][5][6][7][8][9]. There are also experiments in which electric dipole forbidden transitions were observed in cold atoms in magnetooptical traps [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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The 5P3/2→6PJ(J=1/2,3/2) Electric Dipole Forbidden Transitions in Rubidium

Ponciano-Ojeda,

Mojica-Casique,

Hernández-Gómez

et al. 2023

Photonics

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This paper presents a general review of the results of the experimental and theoretical work carried out by our research group to study the 5P3/2→6PJ electric quadrupole transition in atomic rubidium. The experiments were carried out with room-temperature atoms in an absorption cell. A steady-state population of atoms in the 5P3/2 excited state is produced by a a narrow-bandwidth preparation laser locked to the D2 transition. A second CW laser is used to produce the forbidden transition with resolution of the 6PJ hyperfine states of both rubidium isotopes. The process is detected by recording the 420(422) nm fluorescence that occurs when the atoms in the 6PJ state decay directly into the 5S ground state. The fluorescence spectra show a strong dependence on the relative polarization directions of the preparation laser and the beam producing the forbidden transition. This dependence is directly related to a strong anisotropy in the populations of the 5P3/2 intermediate magnetic substates, and also to the electric quadrupole selection rules over magnetic quantum numbers. A calculation based on the rate equations that includes velocity and detuning dependent transition rates is adequate to reproduce these results. The forbidden transition is also shown to be an ideal probe to measure the Autler–Townes splitting generated in the preparation of the 5P3/2 state. Examples of spectra obtained with cold atoms in a magneto-optical trap (MOT) are also presented. These spectra show the expected Autler–Townes doublet structure with asymmetric line profiles that result as a consequence of the red-detuning of the trapping laser in the MOT.

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Study of the Velocity-Selection Satellites Present in the 5p3 / 2 → 6pj(J = 1/2, 3/2) Electric Quadrupole Transitions in Atomic Rubidium

Jiménez-Mier¹,

Ponciano-Ojeda²,

Mojica-Casique³

et al. 2023

Preprint

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Laser spectroscopy of the 5P3/2 → 6Pj (j = 1/2 and 3/2) electric dipole forbidden transitions in atomic rubidium

Cited by 4 publications

References 20 publications

Optical spectroscopy of the 5p_3/2→ 6p_1/2electric dipole-forbidden transition in atomic rubidium

Optical spectroscopy of the 5p_3/2→ 6p_1/2electric dipole-forbidden transition in atomic rubidium

The 5P3/2→6PJ(J=1/2,3/2) Electric Dipole Forbidden Transitions in Rubidium

Study of the Velocity-Selection Satellites Present in the 5p3 / 2 → 6pj(J = 1/2, 3/2) Electric Quadrupole Transitions in Atomic Rubidium

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Laser spectroscopy of the 5P3/2 → 6Pj (j = 1/2 and 3/2) electric dipole forbidden transitions in atomic rubidium

Cited by 4 publications

References 20 publications

Optical spectroscopy of the 5p3/2→ 6p1/2electric dipole-forbidden transition in atomic rubidium

Optical spectroscopy of the 5p3/2→ 6p1/2electric dipole-forbidden transition in atomic rubidium

The 5P3/2→6PJ(J=1/2,3/2) Electric Dipole Forbidden Transitions in Rubidium

Study of the Velocity-Selection Satellites Present in the 5p3 / 2 → 6pj(J = 1/2, 3/2) Electric Quadrupole Transitions in Atomic Rubidium

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Optical spectroscopy of the 5p_3/2→ 6p_1/2electric dipole-forbidden transition in atomic rubidium

Optical spectroscopy of the 5p_3/2→ 6p_1/2electric dipole-forbidden transition in atomic rubidium