Abstract
The classical dipolar approach in molecular engineering for quadratic nonlinear optics (NLO), although remaining a fruitful concept for material conception and elaboration, is confined to quasi onedimensional (1-D) charge transfer (CT) molecules, their hyperpolarizability tensor being reduced to its vectorial part. In order to further exploit the rich possibilities of bi- and tridimensional stereochemistry, the concept of octupolar structures, recently proposed on the basis of group theoretical and quantum mechanical arguments, opens new perspectives in molecular and material engineering.1
© 1994 IEEE
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