SUM-FREQUENCY GENERATION BY REFLECTION OF LIGHT FROM THE SURFACE OF ANONABSORBING ISOTROPIC AND GYROTROPIC MEDIUM

Sum-frequency generation by reflection of light from the surface of a nonabsorbing isotropic and gyrotropic medium is investigated for plane elliptically polarised pump waves. The boundary conditions for an ele ctromagnetic field used in the calculations take account of the spatia l dispersion of the optical response and of the surface inhomogeneity of the media in contact. The dependences of the electric field of the reflected sum-frequency wave on the angles of incidence, frequencies, and states of polarisation of the pump waves are determined. The resul ts also include the dependences of this field on the Cartesian compone nts of the tensors which represent the quadratic (in respect of the fi eld) parts of the surface density of a bound-charge current and of the polarisation of the bulk of the medium with its spatial dispersion ta ken into account.