Scattering of Electromagnetic Waves by an Electron-Phonon System

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Abstract
A theory is developed which described the scattering of electromagnetic waves by the electron density fluctuation of an electron-phonon system. The frequency spectrum of the scattered radiation is calculated by the temperature-dependent Green's function method and is alternatively derived by an elementary treatment in terms of dressed electrons and phonons. The theory may find its application in the study of incoherent scattering of electromagnetic waves in the vacuum ultraviolet region by thin metals. The resulting frequency spectrum of the scattered radiation shows resonances corresponding to the collective response of the electrons to the lattice vibrations, and to the collective excitation of plasma oscillations.

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