Modulating the single-photon transport periodically with two emitters in two one-dimensional coupled cavity arrays

Abstract

Abstract We theoretically investigate the coherent transport behavior of a single-photon in T-type coupled cavity arrays (CCAs). Firstly, the case two two-level atoms (TLA) located inside two cavities of the incident channel is investigated, with the first TLA fixed at the T node and the second TLA in any position of CCA-a. The results show that the position of the second atom can periodically manipulate the transfer rate, and the single-photon can be completely routed into CCA-b deterministically. Secondly, we consider the two Λ -type three level atom instead of the two-level atom. When the driving field is present, the Fano-resonance can be observed and gradually becomes a double-peak with the increase of the driving field strength. In addition, the Rabi frequency of the first atom can alter the position of the double-peak, while the driving field intensity of the second atom only varies the peak value of the transfer rate, and the maximum probability may be obtained when the Rabi frequencies of the two Λ -type TLA are equal.