Open AccessOptimization of the light-induced-fluorescence signals of single atoms and efficient loading of single atoms into a magneto-optical trap
Author(s) -
Jieying Wang,
Bei Liu,
Wen-Ting Diao,
Gang Jin,
He Jun,
Junmin Wang
Publication year - 2014
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.63.053202
Subject(s) - magneto optical trap , atomic physics , polarization (electrochemistry) , laser cooling , magnetic field , trap (plumbing) , trapping , excited state , spectroscopy , laser , quadrupole , materials science , fluorescence , physics , signal (programming language) , laser induced fluorescence , optics , chemistry , quantum mechanics , meteorology , ecology , computer science , biology , programming language
In our experiment, firstly, we carry out the loading of single atoms in the magneto-optical trap (MOT) by increasing the quadrupole magnetic field gradient, improving the background vacuum, and reducing the diameters of the cooling and trapping laser beams. Secondly, we get the single atomic fluorescence signal of a high signal-to-background ratio in the MOT by means of reducing the detuning of cooling light and increasing its intensity appropriately, and using the polarization spectroscopy locking technique to suppress the fluctuations of cooling laser. In addition, with the real-time feedback on quadrupole magnetic field gradient, we demonstrate a probability of loading single atoms in the MOT as high as 98%. We also measure the statistical properties of the single atomic fluorescence which is excited by continuous light in the MOT; the measured second-order correlation is g(2)( = 0) = 0.09.