A large time delay of light via two dimensional atom localization in a coupled cavity waveguide

Abstract We investigate the time delay behavior of light through a Λ -type atomic system interacting with two orthogonal standing-wave fields in a modified reservoir. Results show that transmission spectra splitting occurs in a coupled cavity waveguide (CCW) and the time delay of light relies remarkably on the strong coupling effect between a localized atom and a CCW. The atom localization can even be larger than λ ∕ 100 in two orthogonal directions, which arises from field-induced interference effect in a modified reservoir. The proposed scheme not only provides a high-precision atom localization but also achieves a large time delay of the probe light.