Radiative properties of strongly driven atoms in the presence of photonic bands and gaps

We show that the presence of photonic bands and gaps dramatically modifies the properties of single-atom resonance fluorescence. When, for example, photonic gaps suppress radiative emission on one or both of the strong-field resonance fluorescence sidebands, a driven atom is found to emit monochromatic radiation that is insensitive to fluctuations in the driving-field intensity and does not display the photon antibunching that is normally associated with single-atom resonance fluorescence. In such situations the atom’s radiative properties come to resemble those of a perfectly classical dipole.