  Recently, we have showed a mechanism that could provide a great transmission
enhancement of the light waves passed through subwavelength aperture arrays in
thin metal films not by the plasmon-polariton waves, but by the constructive
interference of diffracted waves (beams generated by the apertures) at the
detector placed in the far-field zone. We now present a quantum reformulation
of the model. The Hamiltonian describing the interference-induced enhancement
of the intensity and energy of a multimode quantum optical field is derived.
Such a field can be produced, for instance, by a subwavelength array of
coherent light sources.
