The localization of light in a 2D periodic atomic medium

C.F. Wang, Jing Cheng, B. Chen

Markus K Oberthaler

Romain Bachelard

X. Wei, Bin Chen, Chunfang Wang +1 more

This paper provides a way of realizing light wave localization via electromagnetically induced transparency, which is quite different from the traditional, off-resonant mechanism-based Aubry-Andre model. The localization of light in a one-dimensional atomic medium is reported in this paper. The medium suggested in this paper is a resonant cold atomic ensemble with N-configuration, which can be modulated to be a quasi-periodic structure in the center area. As the paraxial signal field propagates in the medium, localization can be realized. The localization point and the propagation properties of the signal field are studied in this paper.

Chunling Ding, Jiahua Li, Xiaoxue Yang +2 more

The behavior of two-dimensional (2D) atom localization is explored by monitoring the probe absorption in a microwave-driven four-level atomic medium under the action of two orthogonal standing-wave fields. Because of the position-dependent atom-field interaction, the information about the position of the atom can be obtained via the absorption measurement of the weak probe field. It is found that the localization behavior is significantly improved due to the joint quantum interference induced by the standing-wave and microwave-driven fields. Most importantly, the atom can be localized at a particular position and the maximal probability of finding the atom in one period of the standing-wave fields reaches unity by properly adjusting the system parameters. The proposed scheme may provide a promising way to achieve high-precision and high-resolution 2D atom localization.

Michal Bajcsy, Alexander S. Zibrov, Mikhail D. Lukin