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Nonresonant EFISH And THG Studies Of Nonlinear Optical Property And Molecular Structure Relations Of Benzene, Stilbene, And Other Arene Derivatives.

We report D. C. electric field induced second harmonic generation (EFISH) and third harmonic generation (THG) measurement results on the intrinsic molecular hyperpolarizabilities of benzenes, stilbenes, and other arene derivatives. Structure-property relations, as revealed by a comprehensive set of systematic measurements, are discussed. Issues concerning donor-acceptor strength; charge-transfer; transparency trade-off; conjugation planarity, length, and aromaticity; and heteroatom and side-group substitution effects are included.