Abstract

It is experimentally demonstrated that use of an extremely thin cell (ETC) with the thickness of a Rb atomic vapor column of ∼400 nm allows one to resolve a large number of individual transitions between Zeeman sublevels of the $D_1$ line of ${ }^{87}\mathrm{Rb}$ and ${ }^{85}\mathrm{Rb}$ in the sub-Doppler fluorescence excitation spectra in an external magnetic field of ∼200 G. It is revealed that due to the peculiarities of the Zeeman effect for different hyperfine levels of Rb, all allowed transitions between magnetic sublevels can be clearly resolved for ${ }^{87}\mathrm{Rb} F_g=1\to F_e=1,$ 2 and $F_g=2\to F_e=1,$ 2 fluorescence excitation. Also, relatively good spectral resolution can be achieved for ${ }^{85}\mathrm{Rb} F_g=2\to F_e=2,$ 3 fluorescence excitation. Some partial resolution of transitions between magnetic sublevels is achieved for ${ }^{85}\mathrm{Rb} F_g=3\to F_e=2,$ 3 fluorescence excitation. The spectral resolution of individual transitions allows one to easily observe both linear and nonlinear Zeeman effects in the fluorescence excitation spectra obtained with the help of the ETC. In the fluorescence spectra of a cell of usual length there is no evidence of a spectral resolution of individual transitions at $B\sim 200 \mathrm{G}.$ A simple magnetometer based on ETC with Rb with a submicrometer spatial resolution is described.

© 2005 Optical Society of America

Hyperfine Paschen–Back regime in alkali metal atoms: consistency of two theoretical considerations and experiment

A. Sargsyan, G. Hakhumyan, C. Leroy, Y. Pashayan-Leroy, A. Papoyan, D. Sarkisyan, and M. Auzinsh
J. Opt. Soc. Am. B 31(5) 1046-1053 (2014)

Transition cancellations of ⁸⁷Rb and ⁸⁵Rb atoms in a magnetic field

Artur Aleksanyan, Rodolphe Momier, Emil Gazazyan, Aram Papoyan, and Claude Leroy
J. Opt. Soc. Am. B 37(11) 3504-3514 (2020)

Zeeman effect in the saturation spectroscopy of the ⁸⁷Rb D₂ line

Ho Seong Lee, Sang Eon Park, Jong Dae Park, and Hyuck Cho
J. Opt. Soc. Am. B 11(4) 558-563 (1994)

Magnetic-field-induced absorption with sub-milligauss spectral width in paraffin-coated rubidium vapor cell

Hyun Joon Lee and Han Seb Moon
J. Opt. Soc. Am. B 30(8) 2301-2305 (2013)

Competition between Zeeman and hyperfine pumping in thermal atomic vapor

Rajni Bala, Joyee Ghosh, and Vivek Venkataraman
J. Opt. Soc. Am. B 40(10) 2595-2603 (2023)