NONLINEAR OPTICAL EFFECTS IN MOLECULAR CRYSTALS

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1978

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Ohio State University

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Optical three wave mixing (TWM) has been observed in oriented single crystals of benzene, naphthalene and biphenyl immersed in superfluid helium. Various Raman resonances (CARS) and two-photon resonances into the S1 levels of these molecules have been investigated. These resonances allow the determination of the magnitude of the two-photon tensor and non-resonant third order susceptibility tensor elements relative to Raman cross sections. Anisotropies of these quantities are developed via polarization selection, of light incident on or emerging from various crystal faces in TWM, two-photon absorption and Raman scattering. Experimental conditions as well as implications of these results will be discussed.

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This research was supported by grants from the Army Research Office (Durham), and by a NATO research grant.""


Author Institution: Department of Chemistry and Laboratory for Research on the Structure of Matter, University of Pennsylvania; Laboratoire de Spectrometrie Physique Associ'{e} au C.N.R.S., Universit'{e} Scientifique et M'{e}Adicale

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