2A(G) EXCITON-STATE BELOW 1B(U) EXCITON-STATE IN TRANSPOLYACETYLENE OBSERVED BY 2ND-HARMONIC-GENERATION SPECTROSCOPY

Authors
NISHIOKA T YAMADA T SHIBAHARA S ISHIKAWA K TAKEZOE H FUKUDA A
Citation
T. Nishioka et al., 2A(G) EXCITON-STATE BELOW 1B(U) EXCITON-STATE IN TRANSPOLYACETYLENE OBSERVED BY 2ND-HARMONIC-GENERATION SPECTROSCOPY, JPN J A P 1, 36(3A), 1997, pp. 1099-1104
Citations number
41
Categorie Soggetti
Physics, Applied
Journal title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS → ACNP
Volume
36
Issue
3A
Year of publication
1997
Pages
1099 - 1104
Database
ISI
SICI code
Abstract
We measured second-harmonic-generation spectra of centrosymmetric tran s-polyacetylene films. A resonance peak was observed and assigned to t he 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 e V. We have also discussed the relative magnitude of the transition dip ole between the excited states by comparing the various nonlinear opti cal spectra.