Strong control and squeezing effects of radiation states in a slab waveguide sandwiched between two omnidirectional mirrors

The effect of sandwiching a slab waveguide in air between two omnidirectional mirrors on the local density of modes is investigated theoretically. Design aspects of such a structure are considered, and it is shown that the local density of modes other than the slab-guided mode can be strongly controlled by the mirrors. Lowering of this quantity may lead to a strong suppression of loss of the slab-guided mode owing to excitation of radiation modes by impurity scattering or by transitions in the slab. Presented time-domain calculations indicate that by small time-dependent structural changes light, radiated by an atom or scattered by an impurity, can be squeezed back into its original state.