Femtosecond dynamics of the nonlinear optical response in polydiethynylsilane

We have measured the femtosecond dynamics of the nonlinear optical response χ(3) in polydiethynylsilane (C4H2SiBu2)x, a novel class of π-conjugated polymers incorporating Si, using degenerate four-wave mixing and photoinduced absorption techniques. In resonance conditions at 620 nm we found χ(3)=3×1...

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Bibliographic Details
Published in:Applied physics letters 1991-04, Vol.58 (16), p.1695-1697
Main Authors: WONG, K. S, HAN, S. G, VARDENY, Z. V, SHINAR, J, PANG, Y, IJADI-MAGHSOODI, S, BARTON, T. J, GRIGORAS, S, PARBHOO, B
Format: Article
Language:English
Subjects:
360603 - Materials- Properties
AMES LABORATORY
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
HYDRIDES
HYDROGEN COMPOUNDS
MATERIALS SCIENCE
NATIONAL ORGANIZATIONS
NONLINEAR OPTICS
OPTICAL PROPERTIES
OPTICS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SILICON COMPOUNDS
PHYSICAL PROPERTIES
Physics
POLYMERS
SILANES
SILICON COMPOUNDS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
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Summary:We have measured the femtosecond dynamics of the nonlinear optical response χ(3) in polydiethynylsilane (C4H2SiBu2)x, a novel class of π-conjugated polymers incorporating Si, using degenerate four-wave mixing and photoinduced absorption techniques. In resonance conditions at 620 nm we found χ(3)=3×10−9 esu, which decays in a record time of 135 fs, followed by a slower decay component of 750 fs, without a long tail even at high laser intensities. This material is an excellent candidate for nonlinear optical devices in the sub-THz frequency range.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.105111