ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Degenerate four-wave mixing with femtosecond time resolution is used to measure the magnitude and transient response of the third-order nonlinear optical susceptibility χ(3) (ω;ω,−ω,ω) at 620 nm in nonoriented conducting polymers including polydiacetylene, 〈m1;38p〉polyacetylene, polyaniline, polydiethynylsilane, polythiophene, and polythiophene derivatives. 〈m1;40p〉Resonant and nonresonant excitations influence the magnitude and transient response of χ(3). 〈m1;39p〉The electronic response is instantaneous for preresonant excitation, but for resonant excitation it 〈m1;38p〉has ultrafast and slow components which illustrate photoexcitation dynamics. The 〈m1;38p〉magnitude of χ(3) for all of the polymers is in the range from 10−10 to 5×10−8 esu depending on the energy difference between the laser excitation and the polymer absorption maximum.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.349469
