title: High sensitive determination of laser-induced frequency shifts of ultracold cesium molecules.
abstract: We experimentally present a technique for sensitively determining the laser-induced frequency shifts of the long-range molecular vibrational and rotational levels. The scheme relies on an optical frequency shifter, leading to two laser beams with a precise and adjustable frequency interval. A series of photoassociation spectra are recorded with both beams inducing molecular lines, whose peak separation provides an accurate frequency ruler to measure the frequency shifts of cesium molecular levels, which have not yet been observed in previous reports. The data are compared to theoretical predictions and show a good agreement.
authors.affiliation: The State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, China.
authors.forename: Jizhou
authors.initials: J
authors.lastname: Wu
authors.forename: Zhonghua
authors.initials: Z
authors.lastname: Ji
authors.forename: Yichi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Lirong
authors.initials: L
authors.lastname: Wang
authors.forename: Yanting
authors.initials: Y
authors.lastname: Zhao
authors.forename: Jie
authors.initials: J
authors.lastname: Ma
authors.forename: Liantuan
authors.initials: L
authors.lastname: Xiao
authors.forename: Suotang
authors.initials: S
authors.lastname: Jia