Yu Robert Sun

Associate Researcher

University of Science and Technology of China
Hefei, Anhui 230026, China
Email: robert@mail.ustc.edu.cn

Zheng-Tian Lu

Research Interests

Using the most advanced laser spectrum technology, we can measure the energy level of the helium atoms and its isotopes to an incredible accuracy. Compare those experiment measurements and those theoretic values, we can both test the fundamental QED theory and determine the fine structure constant.

Degrees attained

Ph.D.2012Department of Chemical PhysicsUniversity of Science and Technology of China
B.S.2005Department of Chemical PhysicsUniversity of Science and Technology of China

Employment history

2015 – PresentAssociate research fellowUniversity of Science and Technology of China.
2012 – 2015Post doctorateUniversity of Science and Technology of China.

Visiting Appointments

2009-2010, Argonne National Laboratory, University of Chicago, United States, Joined PhD student.

Selected Publications

  • Precision spectroscopy of atomic helium

    Yu R. Sun and Shui-Ming Hu

    National Science Review 7, 1818(2020)

  • Speed-adjustable atomic beam of metastable helium for precision measurement

    J.-J. Chen, Y. R. Sun, J.-L. Wen, and S.-M. Hu

    Physical Review A 101, 053824 (2020)

  • Light-force-induced shift in laser spectroscopy of atomic helium

    X.Zheng,Y. R. Sun*, J.-J. Chen, J.-L.Wen, S.-M. Hu

    Physical Review A 99, 032506 (2019)

  • Frequency metrology of molecules in the near-infrared by NICE-OHMS

    T.-P. Hua,Y. R. Sun*, J. Wang, A. -W. Liu, S.-M. Hu

    Optical Express 27, 6106 (2019)

  • Measurement of the frequency of the 23S - 23P transition of 4He

    X. Zheng, Y. R. Sun*, J.-J. Chen, W. Jiang, K. Pachucki, S.-M. Hu*

    Physical Review Letters 119, 263002 (2017)

  • Laser spectroscopy of the fine-structure splitting in the 23PJ levels of 4He

    X. Zheng, Y. R. Sun*, J.-J. Chen, W. Jiang, K. Pachucki, S.-M. Hu*

    Physical Review Letters 118, 063001 (2017)

  • G.-P. Feng, X. Zheng, Y. R. Sun*, and S.-M.Hu,
    Laser-spectroscopy measurement of the fine-structure splitting 23P1-23P2 of 4He,
    Physical Review A Rapid Communications, 91, 030502(R), 2015

  • W. Liu, X. -F. Li, J. Wang, Y. Lu, C.-F. Cheng, Y. R. Sun, S.-M. Hu*,
    The 4νCH overtone of 12C2H2: sub-MHz precision spectrum reveals perturbations,
    J. Chem. Phys., 138: 014312, 2013

  • C.-F. Cheng, G.-M. Yang, W. Jiang, Y. R. Sun, L.-Y. Tu, S.-M. Hu*,
    Normalization of the single atom counting rate in an atom trap,
    Opt. Lett., 38(1): 31-33, 2013

  • R. Lambo*, A. Buchachenko, L. Wu, Y. Tan, J. Wang, Y. Sun, A.-W. Liu, and S.-M. Hu,
    Electronic Spectroscopy of Ytterbium in a Neon Matrix,
    J. Chem. Phys. 137: 204315, 2012

  • W. Jiang, K. Bailey, Z.-T. Lu*, P. Muller, T. P. O’Connor, C.-F. Cheng, S.-M. Hu, R. Purtschert, N. C. Sturchio, Y. R. Sun, W. D. Willams, and G.-M. Yang,
    An atom counter for measuring 81kr and 85Kr in environmental samples,
    Geochimica et Cosmochimica Acta, 91:1 -6, 2012

  • C.-F. Cheng, Y. R. Sun, H. Pan, Y. Lu, X.-F. Li, J. Wang, A.-W. Liu, S.-M. Hu*,
    Cavity ring-down spectroscopy of Doppler-broadened absorption line with sub-MHz absolute frequency accuracy,
    Opt. Express, 20(9): 9956-9961, 2012

  • S.-M. Hu*, H. Pan, C.-F. Cheng, Y. R. Sun, X. –F. Li, J. Wang, A. Campargue, A.-W. Liu*,
    The ν=3<-0 S(0)-S(3) electric quadrupole transitions of H2 near 0.8μm,
    Astrophys. J., 749(1): 76, 2012

  • C.-F. Cheng, Y. R. Sun, H. Pan, J. Wang, A.-W. Liu, A. Camargue, S.-M. Hu*,
    Electric-quadrupole transition of H2 determined to 10-9 precision,
    Phys. Rev. A, 85(2): 024501, 2012

  • H. Pan, C.-F. Cheng, Y. R. Sun, B. Gao, A.-W. Liu, S.-M. Hu*,
    Laser-Locked, continuously tunable high resolution cavity ring-down spectrometer,
    Rev. Sci. Instrum, 82(10): 103110, 2011

  • Y. R. Sun, H. Pan, C.-F. Cheng, A.-W. Liu, J.-T. Zhang, S.-M. Hu*,
    Application of cavity ring down spectroscopy to the Boltzmann constant determination,
    Opt. Express., 19(21), 19993-20002, 2011

  • W. Jiang, W. D. Williams, K. Bailey, A. M. Davis, S.-M. Hu, Z.-T. Lu, T.P. O’Connor, R. Purtschert, N. C. Sturchio, Y. R. Sun, P. Mueller*,
    Ar-39 Detection at the 10-16 Isotopic Abundance Level with Atom Trap Trace Analysis,
    Phys. Rev. Lett., 106:103001, 2011

  • C.-F. Cheng, W. Jiang, G. –M. Yang, Y.-R. Sun, H. Pan, Y. Gao, A.-W. Liu, S.-M. Hu*,
    An efficient magneto-optical trap of metastable krypton atoms，
    Rev. Sci. Instrum. 81:123106, 2010.