EXCITONS AND NONLINEAR OPTICAL-SPECTRA IN CONJUGATED POLYMERS

被引：143

作者：

ABE, S

SCHREIBER, M

SU, WP

YU, J

机构：

[1] UNIV MAINZ,INST PHYS CHEM,W-6500 MAINZ,GERMANY

[2] UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.45.9432

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Excitons in conjugated polymers are studied theoretically in the Su-Schrieffer-Heeger model supplemented by long-range Coulomb interactions. The relationship between exciton energies and basic interaction parameters is clarified. Linear and third-order nonlinear optical susceptibilities (two-photon absorption, electroabsorption, and third-harmonic generation) have been calculated, elucidating the significance of singlet and triplet excitons and unbound electron-hole pairs. Using only moderate interaction strength, various experiments in polydiacetylene can be interpreted in a consistent way.

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页码：9432 / 9435

页数：4

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