We develop laser-based ultrasensitive trace analysis methods.
By performing precision measurements on atoms, molecules, and nuclei,
we study fundamental problems in physics and chemistry,
and develop applications in the earth and environmental sciences.

Radiokrypton dating

Radioactive isotope tracers are natural clocks in the environment.

Helium Spectroscopy

The neutral helium atom, with only two electrons, can be theoretically understood to a high degree of precision.

Atmospheric Molecules

Detection of Atmospheric Species by Laser Spectroscopy.

Boltzman Constant

The Bolztmann constant kB is one of the fundamental constant in physics.

Matrix-isolated Atoms

Detection of a single ytterbium (Yb) atom isolated in a solid cryogenic matrix.

225 Ra EDM

An intrinsic electric dipole moment (EDM) of an atom signifies the violation of both parity (P) and time-reversal (T) symmetries.

We are part of Hefei National Laboratory for Physical Sciences at the Microscale,
CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China (USTC).
We are supported by a number of national programs, and collaborate widely with the international community.