Chiral materials in second-order nonlinear optics

被引：1

作者：

Kauranen, M ^{[1
]}

Busson, B ^{[1
]}

Verbiest, T ^{[1
]}

Persoons, A ^{[1
]}

机构：

[1] Tampere Univ Technol, FIN-33101 Tampere, Finland

来源：

LINEAR AND NONLINEAR OPTICS OF ORGANIC MATERIALS | 2001年 / 4461卷

关键词：

chirality; nonlinear optics; nonlinear optical materials; thin films; symmetry;

D O I：

10.1117/12.449826

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We review second-order nonlinear optical properties of chiral materials from the viewpoint of new second-order materials. Chiral molecules are noncentrosymmetric and therefore have a nonvanishing electric-dipole-allowed second-order response. The response is nonvanishing even in macroscopic samples with no polar order including isotropic solutions. Magnetic-dipole interactions of chiral materials can be strong. Their contributions to the nonlinear response allow second-order processes even in centrosymmetric materials. The magnetic contributions to the second-order response of thin films of chiral polyisocyanides and polythiophenes are comparable to the electric contributions. The chiral part of the electric-dipole-allowed nonlinearity dominates the second-order response of thin films of a chiral helicenebisquinone. Quasi-phase-matched second-harmonic generation was demonstrated in alternating stacks of the two enantiomers of the helicenebisquinone.

引用

页码：5 / 14

页数：10

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