  We propose a system of highly efficient photoemitters comprising
metal-dielectric (plasmonic-excitonic) multilayered structures. In the proposed
structure, the absorption in the excitonic layer is greatly enhanced through
quantum interference between the split modes arising from the coupling of the
layered excitons and the plasmons sustained by the metallic layer. Furthermore,
the large interaction volume between surface plasmons and excitons causes
exciton superradiance, which results in the extremely efficient photoemission.
This finding indicates the possibility of designing highly efficient
photoemitters based on simple layered structures.
