A simple method is proposed to determine the quality of antirelaxation coatings of the walls of vacuum optical cells containing alkali metal vapors. The method involves recording the time dependence of the fluorescence intensity of alkali atoms during exposure of the cell by resonant radiation pulses. Theory predicts that to determine the coating quality, it is sufficient to know the fluorescence decay rate and the ratio of the fluorescence intensities at the beginning and end of the pulse laser.A simple method is proposed to determine the quality of antirelaxation coatings of the walls of vacuum optical cells containing alkali metal vapors. The method involves recording the time dependence of the fluorescence intensity of alkali atoms during exposure of the cell by resonant radiation pulses. Theory predicts that to determine the coating quality, it is sufficient to know the fluorescence decay rate and the ratio of the fluorescence intensities at the beginning and end of the pulse laser.

Optoelectronics Instrumentation and Data ProcessingJan 1, 20165 citations

Measurement of the total spin angular momentum 〈 F z 〉 of alkali-metal atoms

Runa Yasuda, Kei Ishii, W. Klassen +2 more

It is important to evaluate the total spin angular momentum of alkali-metal atoms if the atoms serve as a reservoir of angular momenta. We use an absorption-monitoring technique to measure $\ensuremath{\langle}{F}_{z}\ensuremath{\rangle}$, i.e., the expectation values of the quantization ( $z$ ) axis components of the total angular momentum of Cs atoms in the electronic ground state in both uncoated and antirelaxation-coated vacuum cells at room temperature. Cs atoms are polarized via optical pumping and probed using their ${D}_{2}$ transitions. The probe laser frequency is varied across the Doppler-broadened ${D}_{2}$ transition; the $\ensuremath{\langle}{F}_{z}\ensuremath{\rangle}$ values are derived using the integrated absorption coefficients. The largest $\ensuremath{\langle}{F}_{z}\ensuremath{\rangle}$ is 2.5 for the coated cell. We then use a simple model of spin flow through vapor cells to estimate the atomic spin relaxation probabilities after a single surface collision.It is important to evaluate the total spin angular momentum of alkali-metal atoms if the atoms serve as a reservoir of angular momenta. We use an absorption-monitoring technique to measure $\ensuremath{\langle}{F}_{z}\ensuremath{\rangle}$, i.e., the expectation values of the quantization ($z$) axis components of the total angular momentum of Cs atoms in the electronic ground state in both uncoated and antirelaxation-coated vacuum cells at room temperature. Cs atoms are polarized via optical pumping and probed using their ${D}_{2}$ transitions. The probe laser frequency is varied across the Doppler-broadened ${D}_{2}$ transition; the $\ensuremath{\langle}{F}_{z}\ensuremath{\rangle}$ values are derived using the integrated absorption coefficients. The largest $\ensuremath{\langle}{F}_{z}\ensuremath{\rangle}$ is 2.5 for the coated cell. We then use a simple model of spin flow through vapor cells to estimate the atomic spin relaxation probabilities after a single surface collision.

arXiv:2504.19713Physical Review AMar 17, 20250 citations

Attenuated total reflection spectroscopy on alkali-metal atoms

賢東條

Jan 1, 20030 citations

z

) axis components of the total angular momentum of Cs atoms in the electronic ground state in both uncoated and antirelaxation-coated vacuum cells at room temperature. Cs atoms are polarized via optical pumping and probed using their

{D}_{2}

transitions. The probe laser frequency is varied across the Doppler-broadened

{D}_{2}

transition; the $\ensuremath{\langle}{F}_{z}\ensuremath{\rangle}$ values are derived using the integrated absorption coefficients. The largest $\ensuremath{\langle}{F}_{z}\ensuremath{\rangle}$ is 2.5 for the coated cell. We then use a simple model of spin flow through vapor cells to estimate the atomic spin relaxation probabilities after a single surface collision.