EXCITED-STATE ENHANCEMENT OF THE 3RD-ORDER OPTICAL NONLINEARITY OF POLYALKYLTHIOPHENE PUMPED BY LOW REPETITION RATE FEMTOSECOND TI-S AMPLIFIER

Authors
SAKAGUCHI H NAGAMURA T
Citation
H. Sakaguchi et T. Nagamura, EXCITED-STATE ENHANCEMENT OF THE 3RD-ORDER OPTICAL NONLINEARITY OF POLYALKYLTHIOPHENE PUMPED BY LOW REPETITION RATE FEMTOSECOND TI-S AMPLIFIER, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 294, 1997, pp. 279-282
Citations number
8
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
294
Year of publication
1997
Pages
279 - 282
Database
ISI
SICI code
1058-725X(1997)294:<279:EEOT3O>2.0.ZU;2-A
Abstract
Optical pumping effect on the third order optical nonlinearity of poly (3-dodecylthiophene) was investigated by 2 beam degenerate four wave m ixing technique using low repetition rate femtosecond Ti:S amplifier. Four wave mixing signal from the sample was significantly enhanced by optical pumping at 400 nm. Femtosecond time resolved studies on four w ave mixing and excited state dynamics of the entitled compound were ca rried out to elucidate the mechanism of enhancement. Exciton formed by optical pumping in one dimensional polymer backbone might presumably play an important rule on the enhancement of four wave mixing amplitud e.