Atomic and Molecular Optics|15 Article(s)
Coulomb potential influence in the attoclock experimental scheme|Editors' Pick
Zhilei Xiao, Wei Quan, Songpo Xu, Shaogang Yu, Yanlan Wang, Meng Zhao, Mingzheng Wei, Yu Zhou, Xuanyang Lai, Jing Chen, and Xiaojun Liu
Coulomb potential may induce a significant angular offset to the two-dimensional photoelectron momentum distributions for atoms subject to strong elliptically polarized laser fields. In the attoclock experiment, this offset usually cannot be easily disentangled from the contribution of tunneling delay and poses a main obstacle to the precise measurement of tunneling delay. Based on semiclassical calculations, here, we propose a method to extract the equivalent temporal offset induced solely by Coulomb potential (TOCP) in an attoclock experiment. Our calculations indicate that, at constant laser intensity, the TOCP shows distinctive wavelength dependence laws for different model atoms, and the ratio of the target atom’s TOCP to that of H becomes insensitive to wavelength and linearly proportional to (2Ip) 3/2, where Ip is the ionization potential of the target atom. This wavelength and Ip dependence of TOCP can be further applied to extract the Coulomb potential influence. Our work paves the way for an accurate measurement of the tunneling delay in the tunneling ionization of atoms subject to intense elliptically polarized laser fields.
Chinese Optics Letters
  • Publication Date: Jan. 10, 2020
  • Vol. 18, Issue 1, 010201 (2020)
Scaling law in nonsequential double ionization by counter-rotating two-color circularly polarized laser fields
Mian Peng, and Lihua Bai
Chinese Optics Letters
  • Publication Date: Nov. 10, 2020
  • Vol. 18, Issue 11, 110201 (2020)
Improving the NV generation efficiency by electron irradiation
Bowen Zhao, Yang Dong, Shaochun Zhang, Xiangdong Chen, Wei Zhu, and Fangwen Sun
Chinese Optics Letters
  • Publication Date: Aug. 10, 2020
  • Vol. 18, Issue 8, 080201 (2020)
Uncertainty evaluation of the second-order Zeeman shift of a transportable 87Rb atomic fountain clock
Henan Cheng, Siminda Deng, Zhen Zhang, Jingfeng Xiang, Jingwei Ji, Wei Ren, Tang Li, Qiuzhi Qu, Liang Liu, and Desheng Lü
Chinese Optics Letters
  • Publication Date: Dec. 10, 2021
  • Vol. 19, Issue 12, 120201 (2021)
Dark state atoms trapping in a magic-wavelength optical lattice near the nanofiber surface
Dianqiang Su, Xiateng Qin, Yuan Jiang, Kaidi Jin, Zhonghua Ji, Yanting Zhao, Liantuan Xiao, and Suotang Jia
We report the experimental realization of dark state atoms trapping in a nanofiber optical lattice. By applying the magic-wavelength trapping potentials of cesium atoms, the AC Stark shifts are strongly suppressed. The dark magneto-optical trap efficiently transfers the cold atoms from bright (6S1/2, F = 4) into dark state (6S1/2, F = 3) for hyperfine energy levels of cesium atoms. The observed transfer efficiency is as high as 98% via saturation measurement. The trapping lifetime of dark state atoms trapped by a nanofiber optical lattice is also investigated, which is the key element for realizing optical storage. This work contributes to the manipulation of atomic electric dipole spin waves and quantum information storage for fiber networks.
Chinese Optics Letters
  • Publication Date: Nov. 19, 2021
  • Vol. 20, Issue 2, 020201 (2022)
Frequency control of a lattice laser at 759 nm by referencing to Yb clock transition at 578 nm
Yaqin Hao, Yuan Yao, Haosen Shi, Hongfu Yu, Yanyi Jiang, and Longsheng Ma
Chinese Optics Letters
  • Publication Date: Sep. 23, 2022
  • Vol. 20, Issue 12, 120201 (2022)
Automatic, long-term frequency-stabilized lasers with sub-hertz linewidth and 10−16 frequency instability
Chengzhi Yan, Haosen Shi, Yuan Yao, Hongfu Yu, Yanyi Jiang, and Longsheng Ma
We report two ultra-stable laser systems automatically frequency-stabilized to two high-finesse optical cavities. By employing analog-digital hybrid proportional integral derivative (PID) controllers, we keep the merits of wide servo bandwidth and servo accuracy by using analog circuits for the PID controller, and, at the same time, we realize automatic laser frequency locking by introducing digital logic into the PID controller. The lasers can be automatically frequency-stabilized to their reference cavities, and it can be relocked in 0.3 s when interruption happens, i.e., blocking and unblocking the laser light. These automatic frequency-stabilized lasers are measured to have a frequency instability of 6×10-16 at 1 s averaging time and a most probable linewidth of 0.3 Hz. The laser systems were tested for continuous operation over 11 days. Such ultra-stable laser systems in long-term robust operation will be beneficial to the applications of optical atomic clocks and precision measurement based on frequency-stabilized lasers.
Chinese Optics Letters
  • Publication Date: May. 26, 2022
  • Vol. 20, Issue 7, 070201 (2022)