2ND-HARMONIC GENERATION IN REFLECTION FROM CRYSTALLINE METALS - THE INFLUENCE OF STRUCTURE DISORDERING
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We report theoretical and experimental studies of the influence of crystalline structure on the nonlinear-optical response of monocrystalline metals. We show that the lattice disordering leads to a decrease of both the anisotropy and the absolute value of the quadrupole second-order nonlinear susceptibility, in agreement with experiments on optical second-harmonic generation in reflection from the surfaces of various Al samples. 1991 Optical Society of America.