Open AccessObservation of the fluorescence spectrum for a driven cascade model system in atomic beam
Author(s) -
Sicong Tian,
Chunliang Wang,
Cunzhu Tong,
Lijun Wang,
Haihua Wang,
Xiubin Yang,
ZhiHui Kang,
JinYue Gao
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.023559
Subject(s) - atomic coherence , atomic physics , resonance fluorescence , coherence (philosophical gambling strategy) , physics , rubidium , cascade , excited state , optics , fluorescence , beam (structure) , spontaneous emission , laser induced fluorescence , atom (system on chip) , field (mathematics) , laser , materials science , chemistry , quantum mechanics , mathematics , potassium , chromatography , computer science , pure mathematics , metallurgy , embedded system
We experimentally study the resonance fluorescence from an excited two-level atom when the atomic upper level is coupled by a nonresonant field to a higher-lying state in a rubidium atomic beam. The heights, widths and positions of the fluorescence peaks can be controlled by modifying the detuning of the auxiliary field. We explain the observed spectrum with the transition properties of the dressed states generated by the coupling of the two laser fields. We also attribute the line narrowing to the effects of Spontaneously Generated Coherence between the close-lying levels in the dressed state picture generated by the auxiliary field. And the corresponding spectrum can be viewed as the evidence of Spontaneously Generated Coherence. The experimental results agree well with calculations based on the density-matrix equations.