Nonlinear Optical Constants

H o permeability of vacuum, o permittivity of vacuum, A cross section of beam, d nonlinear optical constant Apparatus for harmonic generation measurements... 

In the early days, optical nonlinearity of organic materials was measured usually with powder samples, mainly because it is very difficult to isolate organic compounds in the form of molecular crystals. In the case of centrosymmetric crystal lattices, macroscopic second-order nonlinear optical characteristics are not detected. Molecular crystals are organized assemblies of individual molecules held together by intermolecular forces. Their macroscopic nonlinear optical constants are estimated as the sum of the molecular polarizability of individual molecules. Thus, neglecting intermolecular interactions in the crystal, the nonlinear optical constant, dtlK, is expressed by... 

Optical materials refractive index n (to) n (2order molecular polarizability 0 xlO 30 (esu) 3rd-order nonlinear susceptibility X xlO 14 (esu)... 

NONLINEAR OPTICAL CONSTANTS (continued) Selected SHG Coefficients of NLO Crystals ... 

In papers [6,7] it is reported that the orientational mechanism of nonlinearity of the LC oriented mesophase can cause very large values of nonlinear optical constants the constants of light amplification in the stimulated scattering in NLC [6] and in smectic LC [7]. The point is, that variations of the NLC director direction lead to very large changes of its optical properties, because = j[ - 0.5—1 (/i and are the... 

Nomenclature of Chemical Compounds, 2-13 Nonlinear Optical Constants, 12-179 to 12-181... 

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