RESONANT-RAMAN-SCATTERING STUDIES OF DISORDER IN SOLUTION-CAST POLYDIACETYLENE FILMS

被引：21

作者：

ZHENG, LX

BENNER, RE

VARDENY, ZV

BAKER, GL

机构：

[1] COMMUN RES INC,RED BANK,NJ 07701

[2] UNIV UTAH,DEPT ELECT ENGN,SALT LAKE CITY,UT 84112

[3] UNIV UTAH,INST LASER,SALT LAKE CITY,UT 84112

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.42.3235

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The disorder in polydiacetylene films cast from solution is studied by Raman scattering under preresonance and resonance conditions in both Stokes and anti-Stokes configurations. The disorder-induced inhomogeneities in the exciton energy levels and the strongly coupled vibrations cause strong dispersion of the C?C and C?C stretching frequencies with the laser excitation photon energy, surprisingly similar to that of trans-polyacetylene. We show, however, that the complete inhomogeneously broadened phonon distribution is revealed when the excitation is not in resonance. In addition to the excitation resonance, resonances associated with the Stokes and anti-Stokes emission beams strongly affect the measured Raman profiles. © 1990 The American Physical Society.

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页码：3235 / 3238

页数：4

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