  Enhancing the radiative interaction between quantum electronic transitions is
of general interest. There are two important properties of radiative
interaction: the range and the strength. There has been a trade-off between the
range and the strength observed in the literature. Such apparent trade-off
arises from the dispersion relation of photonic environments. A general recipe
is developed to overcome such trade-off and to simultaneously enhance the range
and the strength of radiative interactions.
