Open AccessEffect of spontaneously generated coherence on absorption and dispersion in probe laser
Author(s) -
Yan Xiang-an,
Jianping Shen,
Bao-yin Yin,
Wenjuan Jiang,
Zhen Huai-Bin,
Yanpeng Zhang
Publication year - 2008
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.57.3538
Subject(s) - electromagnetically induced transparency , coherence (philosophical gambling strategy) , laser , atomic physics , absorption (acoustics) , resonance (particle physics) , atomic system , materials science , dispersion (optics) , atom (system on chip) , atomic coherence , absorption spectroscopy , coupling (piping) , coupling strength , optics , physics , molecular physics , condensed matter physics , quantum mechanics , computer science , metallurgy , embedded system
A theoretical investigation is carried into the effect of spontaneously generated coherence on absorption and dispersion in probe laser of Y-type atom system. It is found that the electromagnetically induce transparency window in the system narrows gradually as the spontaneously generated coherence intensifies. Moreover, the anomalous dispersion appears and the absorption changes from negative value to positive valve at resonance. At the same time, the absorption is zero or negative near resonance when the relative strength of the coupling field and pump field are different, and the atomic medium shows positive absorption when the two fields are exattly or nearly equal and close.