Abstract
The one- and two-photon scattering matrix is obtained analytically for a one-dimensional waveguide and a pointlike scatterer with excited levels (generalized atom). We argue that the two-photon scattering matrix contains sufficient information to distinguish between different level structures which are equivalent for single-photon scattering, such as a atom with excited levels and two two-level systems. In particular, we show that the scattering with the atom exhibits a destructive interference effect leading to two-photon coupled-resonator-induced transparency, where the nonlinear part of the two-photon scattering matrix vanishes when each incident photon fulfills a single-photon condition for transparency.
- Received 8 April 2016
DOI:https://doi.org/10.1103/PhysRevA.94.053857
©2016 American Physical Society