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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 18, Iss. 11 — Nov. 1, 2001
  • pp: 1620–1626

Microscopic nonlinearities of two-component organic crystals

Christian Bosshard, Rolf Spreiter, and Peter Günter  »View Author Affiliations


JOSA B, Vol. 18, Issue 11, pp. 1620-1626 (2001)
http://dx.doi.org/10.1364/JOSAB.18.001620


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Abstract

We determine the molecular first-order hyperpolarizability β of the highly nonlinear organic salt 4-N,N-dimethylamino-4-N-methyl stilbazolium tosylate (DAST, βzzz=(1540±250)×10-40m4/V at λ = 1542 nm) and the cocrystal 4-{2-[1-(2-hydroxyethyl)-4-pyridylidene]-ethylidene}-cyclo-hexa-2,5-dien-1-one)–(methyl 2,4-dihydroxybenzoate) (M2-MDB, βzzz=(1510±250)×10-40m4/V at λ = 1907 nm) in solution. These values are compared with the molecular first-order hyperpolarizabilities in the solid state, calculated with the measured nonlinear optical coefficient of the crystals. For both materials we show that the molecular nonlinearity in the solid state is considerably smaller than in solution. This lowering of the nonlinearity is attributed to the relatively strong Coulomb interactions in DAST and to the very strong hydrogen bonding in M2-MDB.

© 2001 Optical Society of America

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(160.4890) Materials : Organic materials
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials

Citation
Christian Bosshard, Rolf Spreiter, and Peter Günter, "Microscopic nonlinearities of two-component organic crystals," J. Opt. Soc. Am. B 18, 1620-1626 (2001)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-18-11-1620

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