Title of article
One-dimensional exciton system in trans-polyacetylene
Author/Authors
Nishioka، نويسنده , , T. and Yamada، نويسنده , , T. and Shibahara، نويسنده , , S. and Ishikawa، نويسنده , , K. and Takezoe، نويسنده , , H. and Fukuda، نويسنده , , A.، نويسنده ,
Issue Information
دوماهنامه با شماره پیاپی سال 1997
Pages
2
From page
961
To page
962
Abstract
Recently, we clarified that a sharp absorption/reflection peak at 1.5 eV of directly synthesized trans-polyacetylene films comes not from square-root singularity of joint density of states between one-dimensional bands, but from one-dimensional 1Bu exciion state. In this letter, we found a peak at about 0.96 eV in second-harmonic-generation spectra, and attributed this peak to resonance enhancement at the energy corresponding to the fundamental wavelength. The resonance state is not electric-dipole-forbidden but an electric-quadrupole- or magnetic-dipole-allowed state, most probably a 2Ag exciton state.
Keywords
Non-linear optical method , Polyacetylene and derivatives , Reflection spectroscopy
Journal title
Synthetic Metals
Serial Year
1997
Journal title
Synthetic Metals
Record number
2070811
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