2A(g) exciton state below 1B(u) exciton state in trans-polyacetylene observed by second-harmonic-generation spectroscopy

被引：10

作者：

Nishioka, T

Yamada, T

Shibahara, S

Ishikawa, K

Takezoe, H

Fukuda, A

机构：

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1997年 / 36卷 / 3A期

关键词：

trans-polyacetylene; exciton; forbidden state; second-harmonic generation; third-harmonic generation; electromodulation;

D O I：

10.1143/JJAP.36.1099

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We measured second-harmonic-generation spectra of centrosymmetric trans-polyacetylene films. A resonance peak was observed and assigned to the electric-quadrupole transition to the 2A(g) exciton state at about 0.96 eV, which is located below the 1B(u) exciton state at about 1.5 eV. We have also discussed the relative magnitude of the transition dipole between the excited states by comparing the various nonlinear optical spectra.

引用

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页码：1099 / 1104

页数：6

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