The 5P3/2 → 6PJ (J=1/2,3/2) Electric Dipole Forbidden Transitions in Rubidium
Name
photonics-10-01335-v2.pdf
Size
871.47 KB
Format
Adobe PDF
Checksum (MD5)
0a0091a46e4b7ee7e5c9c1b823667d16
Author(s)
Ponciano-Ojeda, Francisco
Mojica-Casique, Cristian
Hernández-Gómez, Santiago
Del Angel, Alberto
Hoyos-Campo, Lina M.
Flores-Mijangos, Jesús
Ramírez-Martínez, Fernando
Sahagún Sánchez, Daniel
Jáuregui, Rocío
Jiménez-Mier, José
Date Issued
December 1, 2023
Publisher
Multidisciplinary Digital Publishing Institute
Citation
Photonics 10 (12): 1335 (2023)
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.3390/photonics10121335
