BRIEF COMMUNICATIONS: Influence of spatial dispersion on reflected second harmonic
An analysis is made of the influence of spatial dispersion on the spectral distribution of a reflected second harmonic. It is shown that the spectrum of the harmonic may exhibit, near the exciton absorption line, an additional maximum at a frequency corresponding to the phase matching between the first (fundamental-frequency) and second harmonic waves. An analysis is made of the possibility of determination of the effective mass of an exciton from the spectral distribution of the intensity of a reflected harmonic.