Yu Robert Sun  Associate Researcher




HeFei National Laboratory For Physical Sciences at the Microscale.

University of Science and Technology of China.


Hefei, 230026, P.R.China

Email: robert@mail.ustc.edu.cn

Degrees Attained


Ph.D., 2012, Department of Chemical Physics, University of Science and Technology of China

B.S., 2005, Department of Chemical Physics, University of Science and Technology of China

Employment History


2012 - 2015, Post doctorate, University of Science and Technology of China.

2015 - present, Associate research fellow, University of Science and Technology of China.

Visiting Appointments


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

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.

Selected Publications


  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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.