Ultraslow light realization using an interacting Bose-Einstein condensate trapped in a shallow optical lattice

H Mikaeili; A Dalafi; M Ghanaatshoar; B Askari

doi:10.1038/s41598-022-08250-9

Ultraslow light realization using an interacting Bose-Einstein condensate trapped in a shallow optical lattice

Sci Rep. 2022 Mar 15;12(1):4428. doi: 10.1038/s41598-022-08250-9.

Authors

H Mikaeili¹, A Dalafi², M Ghanaatshoar¹, B Askari³

Affiliations

¹ Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran.
² Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran. a_dalafi@sbu.ac.ir.
³ Department of Physics, Shahid Beheshti University, Tehran, Iran.

Abstract

In this article, we propose an experimentally feasible scheme for the ultraslow light realization based on the optomechanically induced transparency (OMIT) phenomenon using a hybrid optomechanical system consisting of a one-dimensional Bose-Einstein condensate trapped in a shallow optical lattice considering the nonlinear effect of atom-atom interaction. It is shown how the system can switch from the normal mode splitting to the OMIT regime by manipulation of the s-wave scattering frequency of atomic collisions when the cavity is pumped at a fixed rate. Then, it is shown that an ultraslow light with a time delay more than 150 ms corresponding to a group velocity about 1 mm/s is achievable by controlling the optical lattice depth as well as the strength of atom-atom interaction and the number of atoms. Importantly, such an ultraslow light is detectable in the output of the cavity since it occurs in the frequency region of coupling-probe detuning where the reflection coefficient of the cavity is maximum.