Analytical solutions for a doubly driven two-level atom

doi:10.1088/1674-1056/26/7/074203

Abstract We have deduced analytical solutions of an energy level diagram of the doubly driven/dressed atom for a two-level atom exposed to a strong near-resonant bichromatic laser field in a special case, i.e., the bichromatic field with frequencies ω₁ and ω₂, and Rabi frequencies Ω₁ and Ω₂, in which the first coupling field of \varOmega₁ acts on the bare atomic levels, and then the resulting singly dressed states are driven by the second coupling field of Ω₂, thus resulting in the doubly dressed atom. We have measured the probe absorption spectra of a doubly driven two-level atom. The system consists of 5²S_1/2,F=2 and 5²P_3/2,F'=3 states of ⁸⁷Rb atoms in a magneto-optical trap (MOT) as well as the cooling/trapping beams and an additional coupling field. As for the spectroscopic properties of the doubly driven two-level atom, theoretical analytical solutions are in general agreement with the experimental spectrum as a whole.

Keywords: the doubly driven/dressed atom near-resonant bichromatic laser field energy level

Received: 19 February 2017
Revised: 01 March 2017
Accepted manuscript online:

PACS:	42.50.Ct	(Quantum description of interaction of light and matter; related experiments)
	42.50.Nn	(Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)
	32.70.Jz	(Line shapes, widths, and shifts)
	32.80.Wr	(Other multiphoton processes)

Fund: Project supported by Beijing Natural Science Foundation,China (Grant No.1164016),the National Natural Science Foundation of China (Grant Nos.11604334,61227807,and 61575108),and the Tsinghua Initiative Scientific Research Program,China (Grant No.2013THZ02-3).

Corresponding Authors: Zhi-Ping Zhong
E-mail: zpzhong@ucas.ac.cn

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Jin-Yun Liu(刘晋允), Feng-Dong Jia(贾凤东), Xiao-Kang Li(李晓康), Shuang-Fei Lv(吕双飞), Xiang-Yuan Xu(许祥源), Ping Xue(薛平), Zhi-Ping Zhong(钟志萍) Analytical solutions for a doubly driven two-level atom 2017 Chin. Phys. B 26 074203

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