Quantum Theory of Light Scattering by Damped Polaritons

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Abstract
A quantum-mechanical theory is developed to describe the scattering of intense laser light from polaritons. The theory includes the effects of lattice damping on the scattering process. The spectral properties of the spontaneous emission are described and the scattering intensity as a function of scattering angle is obtained. Explicit formulas for the integrated signal intensity, including the effects of finite pump-beam divergence, are derived. Difficulties previously encountered in describing the polariton dispersion curve in the presence of damping have also been resolved in the present work.