Abstract
Picosecond pump and probe experiments were carried out on fully oriented transpolyacetylene. Exciting the sample at 527 nm, photoinduced bleaching and absorption were observed at 527 nm and 1054 nm, respectively. The measurements give an upper limit of 2 ps for the relaxation time of the photogenerated 0.5 eV hot carriers to the band edges. The evaluation of the measured optical processes strongly suggests the conclusion that photoinduced structural distortions of the polyacetylene chain result in observable transient decrease of the interband absorption. This may be ascribed to the reduction of the density of electronic states and to that of the interband transition matrix element of the momentum operator.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A.J. Heeger, D. Moses, M. Sinclair: Synth. Met.15, 95 (1986)
W.P. Su, J.R. Schrieffer, A.J. Heeger: Phys. Rev. B22, 2099 (1980)
W.P. Su, J.R. Schrieffer: Proc. Natl. Akad. Sci. USA77, 5626 (1980)
E.J. Mele: Phys. Rev. B26, 6901 (1982)
J. Orenstein, G.L. Baker: Phys. Rev. Lett.49, 1043 (1982)
Z. Vardeny, J. Strait, D. Moses, T.C. Chung, A.J. Heeger: Phys. Rev. Lett.49, 1657 (1982)
C.V. Shank, R. Yen, R.L. Fork, J. Orenstein, G.L. Baker: Phys. Rev. Lett.49, 1660 (1982)
G.B. Blanchet, G.R. Fincher, T.C. Chung, A.J. Heeger: Phys. Rev. Lett.50, 1938 (1983)
F. Moraes, H. Schaffer, M. Kobayashi, F. Wudl: Phys. Rev. B30, 2948 (1984)
G. Leising: Polym. Bull.11, 401 (1984)
H. Kahlert, G. Leising: Mol. Cryst. Liq. Cryst.117, 1 (1985) (Proc. Intl. Conf. on the Physics and Chemistry of Low Dimensional Synthetic Metals)
G. Leising, D. Leitner, H. Kahlert: Mol. Cryst. Liq. Cryst.117, 67 (1985) (Proc. Intl. Conf. on the Physics and Chemistry of Low Dimensional Synthetic Metals)
F. Krausz, T. Juhàsz, J.S. Bakos, Cs. Kuti: J. Phys. E19, 1027 (1986)
G. Leising, M. Filzmoser: In Electronic Properties of Conjugated Polymers, Springer Ser. Solid-State Sci.76 (Springer, Berlin, Heidelberg 1987) p. 128
F. James, M. Roos:CERN Computer Centre Program Library (CERN, 1979) p. D-506
E.A. Imhoff, D.B. Fitchen, R.E. Stahlbush: Solid State Commun.44, 329 (1982)
The basic concept for deriving (1) can be found in F. Wooten:Optical Properties of Solids (Academic, New York 1974)
P.M. Grant, I. Batra: J. Phys. (Paris)44, C3–437 (1983)
D. Moses, A. Feldblum, E. Ehrenfreund, A.J. Heeger, T.C. Chung, A.G. MacDiarmid: Phys. Rev. B26, 3361 (1982)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Krausz, F., Lásztity, P., Bakos, J.S. et al. The influence of photoinduced structural distortions on interband absorption in polyacetylene. Appl. Phys. B 45, 21–25 (1988). https://doi.org/10.1007/BF00692336
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00692336