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Proceedings Paper

The Low Temperature Picosecond Spectroscopy Of Polydiacetylene PTS In The Small Signal Limit
Author(s): M J. Nowak; G. J. Blanchard; G. L. Baker; S. Etemad; Z. G. Soos
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Paper Abstract

Picosecond pump-probe spectroscopy has been used to investigate excitons in polydiacetylene PTS. At temperatures below 195 K, neighboring chains are inequivalent due to a structural phase transition and their excitons differ in energy by 50 meV. Pumping either band forms excitons that decay in a few picoseconds with no significant interchain transport on the timescale of the exciton lifetime. We attribute a novel long-lived modulation of the low temperature exciton absorption, and the corresponding shifts in oscillator strength, to changes in the orientation of the PTS side-groups.

Paper Details

Date Published: 15 January 1990
PDF: 6 pages
Proc. SPIE 1147, Nonlinear Optical Properties of Organic Materials II, (15 January 1990); doi: 10.1117/12.962103
Show Author Affiliations
M J. Nowak, Bellcore and Princeton University (United States)
G. J. Blanchard, Bellcore (United States)
G. L. Baker, Bellcore (United States)
S. Etemad, Bellcore (United States)
Z. G. Soos, Princeton University (United States)

Published in SPIE Proceedings Vol. 1147:
Nonlinear Optical Properties of Organic Materials II
Garo Khanarian, Editor(s)

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