Super-Resolution Imaging of a Single Cold Atom on a Nanosecond Timescale

Abstract Atomic Physics Concept

The team of academician GUO Guangcan of University of Science and Technology of China (USTC) of the Chinese Academy of Sciences has made important progress in the research of cold

In this study, the researchers adopted the main idea of the Stimulated Emission Depletion (STED) microscopy in the classical super-resolution imaging field, and combined it with the atomic quantum state initialization and reading technology of the cold atom system. They realized super-resolved imaging of a single cold atom (ion) directly for the first time.

Experimental results showed that the spatial resolution of the imaging method can exceed the diffraction limit by more than one order, and the imaging resolution of 175 nm can be achieved by using an objective lens with a numerical aperture of only 0.1.

To further demonstrate the time resolution advantage of this method, the researchers achieved both a time resolution of 50 ns and a single ion positioning DOI: 10.1103/PhysRevLett.127.263603