Second-order nonlinear optical response

In summary, we have briefly reviewed current research highlights from studies of second order nonlinear optical responses in organic and polymeric media. We have stressed how fundamental studies have led to microscopic understanding of important electronic states that comprise the origin of the large second order nonlinear responses in these... 

The study of chiral materials with nonlinear optical properties might lead to new insights to design completely new materials for applications in the field of nonlinear optics and photonics. For example, we showed that chiral supramolecular organization can significantly enhance the second-order nonlinear optical response of materials and that magnetic contributions to the nonlinearity can further optimize the second-order nonlinearity. Again, a clear relationship between molecular structure, chirality, and nonlinearity is needed to fully exploit the properties of chiral materials in nonlinear optics. 

Comments on NLO and Electrooptic Coefficients. Typically, the Pockels effect is observed at relatively low frequencies (up to gigahertz) so that slower nonlinear polarization mechanisms, such as vibrational polarizations, can effectively contribute to the "r" coefficients. The tensor used traditionally by theorists to characterize the second-order nonlinear optical response is xijk Experimentalists use the coefficient dijk to describe second-order NLO effects. Usually the two are simply related by equation 31 (16) ... 

Reviewed in Zyss J, Chemla DS (1987) Quadratic nonlinear optics and optimization of the second-order nonlinear optical response of molecular crystals. In Chemla DS, Zyss J (eds) Nonlinear and optical properties of organic molecules and crystals. Academic Press, Orlando, p 23... 

J. Zyss and D.S. Chemla, Quadratic Nonlinear Optics and Optimization of Second-Order Nonlinear Optical Response of Molecular Crystals, Eds. D.S. Chemla and J. Zyss, Academic Press, Orlando, FL, 1987, Vol. 1, pp. 23-191. 

ELECTRONIC ORIGIN OF SECOND ORDER NONLINEAR OPTICAL RESPONSES IN CONJUGATED LINEAR CHAIN STRUCTURES AND HIGHLY CHARGE CORRELATED tt-ELECTRON STATES... 

Similar conclusions concerning the relation between the relative molecular orientation and the first hyperpolarizability have been drawn by Hamada [13] in the case of the MNA dimer as well as by Okuno et al. [53] in a study on linear and parallel dimers of 4-dimethylamino-4 -carboxyazobenzene and 4-dimethyl-amino-2 -nitro-4 -carboxyazobenzene. The impetus was the desire for an explanation for the large second-order nonlinear optical responses of cone-shaped azobenzene dendrimers. Okono et al. also assessed the adequacy of three classical electrostatic models (Section IV). 

Dehu, C., Meyers, F., Hendrickx. E.. Clays, K., Persoons, A., Marder, S.R., Bredas, J.L. Solvent effects on the second-order nonlinear optical response of tr-conjugated molecules A combined evaluation through self-consistent reaction field calculations and hyper-Rayleigh scaterring measurements. J. Am. Chem. Soc. 117, 10127-10128 (1995)... 

Keywords Characterization techniques, Second-order nonlinear optical response, Third-order... 

Furthermore, the success of the quaternarization reaction was demonstrated by the appearance of a Nli peak and the shift at lower BE values of the chlorine signal (from 199.9 to 199.0 eV), consistent with the formation of a charge - compensating chloride anion. In the same field, Lin and co-workers synthesised [146] and characterised [147] some siloxane-based self-assembled stilbazolium multilayers that are intrinsecally acentric and exhibit very large second order nonlinear optical response (see Fig. 4.40 for the detailed multilayer construction). 

Second-Order Nonlinear Optical Responses of Anils 187 8.3... 

J., Bures, E, Bogdan, E., Castet, E, Ducasse, L., and Rodriguez, V. (2011) Effects of the nature and length of the x-conjugated bridge on the second-order nonlinear optical responses of... 

Guillaume, M., Champagne, B., Markova, N., Enchev, V., and Castet, E. (2007) Ab initio investigation on the second-order nonlinear optical responses in keto-enol equilibria of salicylideneanilines. /. Phys. Chem. A, 111, 9914-9923. 

Hidalgo Cardenuto, M. and Champagne, B. (2014) QM/MM investigation of the concentration effects on the second-order nonlinear optical responses... 

Botek E, Andre JM, Champagne B, Verbiest T, Persoons A (2005) Mixed electric-magnetic second-order nonlinear optical response of helicenes. J Chem Phys 122 234713... 

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