| In this talk, the role of quantum interference effects induced by an embedded two-level system on the photon transport properties in waveguiding structures that exhibit cutoffs (band edges) in their dispersion relation is analyzed. In particular, it is demonstrated demonstrate that these systems invariably exhibit single- particle photon-atom bound states and strong effective nonlinear responses on the few-photon level. Based on this, it is found that the properties of these photon-atom bound states may be tuned via the underlying dispersion relation and that their occupation can be controlled via multi-particle scattering processes. This opens an interesting route for controlling photon transport properties in a number of solid-state based quantum optical systems and the realization of corresponding functional elements and devices. |
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