Many-Photon Effects in Inelastic Light Scattering:. Theory and Model Applications

摘要: A new formalism, based on the method of Excitation Amplitudes, is presented in order to set up a theory second harmonic generation (SHG) and other Inelastic Light Scattering phenomena, like dynamical Start effect, when many-photon effects are considered. We develop quantum its semiclassical limit equal footing, show that maximum intensity Second Harmonic fields does not generally correspond exactly twice incident frequency. The most interesting case occurs highly polarizable systems exciting field strong enough produce appreciable effects, yet there still observable fluctuations. inclusion electron-photon coupling all orders then leads including contribution Dynamical Stark Effect SHG response, as shown by model calculations.