Phonoriton: A New Elementary Excitation in Semiconductors under Intense Pump Conditions

When a bulk semiconductor with a direct gap is excited by an intense electromagnetic wave near the exciton resonance, the exciton polariton spectrum around the frequencies of Stokes and Anti-Stokes scattering will be mixed with certain phonons through the exciton-phonon interaction, producing new elementary excitations. These new elementary excitations are called “phonoritons”. In this paper the construction, existence condition, dispersion and other properties of the phonoriton are discussed. Two experiments for examination of the phonoriton spectrum reconstruction are proposed.