Abstract
Much of the theoretical effort to understand the mechanism of optical nonlinearity in π-conjugated polymers has been focused towards explaining the early observation of only two resonances in the third harmonic generation spectrum of trans-polyacetylene. A recent theory of third order optical nonlinearity predicts three, instead of two, resonances, with their intensities decreasing with increasing frequencies. This is a fundamental difference between the band and the exciton pictures of π-conjugated polymers. Very recent experimental results obtained with cis-polyacetylene, as well as earlier experiments on two blue forms of polydiacetylenes, are in complete agreement with this prediction. An isolated single strand of cis-polyacetylene should exhibit exciton behavior. We briefly discuss the latest experimental results for trans-polyacetylene.
| Original language | English |
|---|---|
| Pages (from-to) | 1665-1672 |
| Number of pages | 8 |
| Journal | The Journal of Chemical Physics |
| Volume | 100 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1994 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry
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Observation of three resonances in the third harmonic generation spectrum of conjugated polymers : Evidence for the four-level essential states model. / Mazumdar, S.; Guo, F.
In: The Journal of Chemical Physics, Vol. 100, No. 2, 01.01.1994, p. 1665-1672.Research output: Contribution to journal › Article
TY - JOUR
T1 - Observation of three resonances in the third harmonic generation spectrum of conjugated polymers
T2 - Evidence for the four-level essential states model
AU - Mazumdar, S.
AU - Guo, F.
PY - 1994/1/1
Y1 - 1994/1/1
N2 - Much of the theoretical effort to understand the mechanism of optical nonlinearity in π-conjugated polymers has been focused towards explaining the early observation of only two resonances in the third harmonic generation spectrum of trans-polyacetylene. A recent theory of third order optical nonlinearity predicts three, instead of two, resonances, with their intensities decreasing with increasing frequencies. This is a fundamental difference between the band and the exciton pictures of π-conjugated polymers. Very recent experimental results obtained with cis-polyacetylene, as well as earlier experiments on two blue forms of polydiacetylenes, are in complete agreement with this prediction. An isolated single strand of cis-polyacetylene should exhibit exciton behavior. We briefly discuss the latest experimental results for trans-polyacetylene.
AB - Much of the theoretical effort to understand the mechanism of optical nonlinearity in π-conjugated polymers has been focused towards explaining the early observation of only two resonances in the third harmonic generation spectrum of trans-polyacetylene. A recent theory of third order optical nonlinearity predicts three, instead of two, resonances, with their intensities decreasing with increasing frequencies. This is a fundamental difference between the band and the exciton pictures of π-conjugated polymers. Very recent experimental results obtained with cis-polyacetylene, as well as earlier experiments on two blue forms of polydiacetylenes, are in complete agreement with this prediction. An isolated single strand of cis-polyacetylene should exhibit exciton behavior. We briefly discuss the latest experimental results for trans-polyacetylene.
UR - http://www.scopus.com/inward/record.url?scp=0000557340&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000557340&partnerID=8YFLogxK
U2 - 10.1063/1.466594
DO - 10.1063/1.466594
M3 - Article
AN - SCOPUS:0000557340
VL - 100
SP - 1665
EP - 1672
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
SN - 0021-9606
IS - 2
ER -