Open AccessExperimental study of ultracold cesium atom photoassociation spectrum using an amplitude modulation technique
Author(s) -
Lirong Wang,
Jiang Ma,
Linjie Zhang,
Xiao Liu,
Suotang Jia
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.6373
Subject(s) - ultracold atom , atomic physics , caesium , physics , laser , amplitude , excited state , dissociation (chemistry) , trapping , optics , quantum , ecology , chemistry , quantum mechanics , nuclear physics , biology
A high resolution photoassociation spectrum of ultracold cesium atoms is reported in this paper. A photoassociation laser with its frequency red detuned below 6S1/2+6P3/2 dissociation limit acts on the cold cesium atoms in magnetic optical trap and the excited ultracold molecules generated in the photoassociation process are observed. In order to obtain a high signal-to-noise ratio, the trapping laser is amplitude modulated using acousto-optic modulator and the fluorescence signal is demodulated by lock-in technique. The results are discussed using the density matrix equations.