Dressed-state electromagnetically induced transparency for light storage in uniform-phase spin waves

作者：Sibalic N^*; Kondo J M; Adams C S; Weatherill K J

来源：Physical Review A, 2016, 94(3): 033840.

DOI：10.1103/PhysRevA.94.033840

We present, experimentally and theoretically, a scheme for dressed-state electromagnetically induced transparency (EIT) in a three-step cascade system in which a four-level system is mapped into an effective three-level system. Theoretical analysis reveals that the scheme provides coherent-state control via adiabatic following and a generalized protocol for light storage in uniform phase spin-waves that are insensitive to motional dephasing. The three-step driving enables a number of other features, including spatial selectivity of the excitation region within the atomic medium, and kick-free and Doppler-free excitation that produces narrow resonances in thermal vapor. As a proof of concept, we present an experimental demonstration of the generalized EIT scheme using the 6S(1/2) -> 6P(3/2) -> 7S(1/2) -> 8P(1/2) excitation path in thermal cesium vapor. This technique could be applied to cold and thermal ensembles to enable longer storage times for Rydberg polaritons.

• 出版日期2016-9-21