Open AccessFluorescence weakening due to radiation trapping in a high density cold-atom cloud
Author(s) -
Shuyu Zhou,
Xu Zhen,
Qiuzhi Qu,
Shanyu Zhou,
Liang Liu,
Yuzhu Wang
Publication year - 2009
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.58.1590
Subject(s) - trapping , fluorescence , redistribution (election) , ultracold atom , atomic physics , radiation trapping , radiation , atom (system on chip) , materials science , magnetic field , physics , trap (plumbing) , molecular physics , optics , ecology , quantum mechanics , politics , political science , law , computer science , quantum , biology , embedded system , meteorology
We have measured the change of fluorescence from cold 87Rb atoms after magnetic field of the magneto-optic trap is turn off. A rise in fluorescence within several tens of milliseconds was observed. Analyzing this phenomenon in connection with the experimental conditions, we found that incoherent pumping field due to radiation trapping in the high density cold-atom cloud was the reason of fluorescence weakening under tight confinement by the magneto-optic trap. We have also performed a simple numerical simulation, which indicated that the calculations agree with experimental results only when the effect of frequency redistribution of scattered light is taken into account.