Effect of collisions on the shape of the coherent population trapping resonance detected by the Ramsey method

We report on a theoretical model of the effect of coherent population trapping in alkali atoms in an optically thin gas cell with a buffer gas at a nonzero temperature in a pulsed laser field. The shape of the Ramsey resonance is analysed for two different temperature ranges, i. e. for a 'cold&...

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Bibliographic Details
Published inQuantum electronics (Woodbury, N.Y.) Vol. 50; no. 11; pp. 1023 - 1028
Main Authors Voloshin, G.V., Barantsev, K.A., Litvinov, A.N.
Format Journal Article
LanguageEnglish
Published Bristol Kvantovaya Elektronika, Turpion Ltd and IOP Publishing 01.11.2020
IOP Publishing
Subjects
alkali atoms
Buffers
coherent population trapping
COLLISIONS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
EXCITED STATES
gas cell
HYPERFINE STRUCTURE
LASER RADIATION
moving atoms
Pulsed lasers
pulsed pumping
PULSES
RESONANCE
TEMPERATURE RANGE
Trapping
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Summary:We report on a theoretical model of the effect of coherent population trapping in alkali atoms in an optically thin gas cell with a buffer gas at a nonzero temperature in a pulsed laser field. The shape of the Ramsey resonance is analysed for two different temperature ranges, i. e. for a 'cold' atomic ensemble and for an ensemble of 'hot' atoms in a cell with a buffer gas. The influence of the hyperfine structure of the excited level on the shift of the central Ramsey resonance is investigated.
ISSN:1063-7818
1468-4799
DOI:10.1070/QEL17064