Careful studies of the generating mechanism for organic and poly-meric materials,the synthese of the selected compounds and the factors influ-encing on second harmonic generation (SHG) powder effect,have showedexceptionally nonlinear optical properties to some materials with the conjugatedπ-electron molecular structure under the action of outer field.The factors ofinfluence on SHG would be A~(δ-)-D~(δ+)+structure,the polarizability of substit-uted group,and intermolecular hydrogen bond etc.If the diacetylen...
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