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Proceedings Paper

Femtosecond optical studies of cuprates
Author(s): Michael L. Schneider; S. Rast; Marshall Onellion; Jure Demsar; Antoinette J. Taylor; Yu D. Glinka; Norman H. Tolk; Yuhang Ren; Gunter Luepke; A. Klimov; Ying Xu; Roman Sobolewski; Weidong Si; X. H. Zeng; A. Soukiassian; Xiaoxing Xi; M. Abrecht; Daniel Ariosa; Davor Pavuna; Recardo Manzke; J. O. Printz; D. K. Parkhurst; K. E. Downum; P. Guptasarma; Ivan Bozovic
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Paper Abstract

Femtosecond optical reflectivity measurements of La2-xSrxCuO4, La2CuO4+y, Bi2Sr2CuO6+z and Bi2Sr2CaCu2O8+δ thin films and single crystal samples indicate qualitative changes with fluence. At the lowest fluencies, there is a power law divergence in the relaxation time. The divergence has an onset temperature of 55±15K, independent of whether the sample is in the superconducting or normal states. At slightly higher fluencies, still perturbative, the additional response does not exhibit this power law divergence. At quite high fluencies- no longer perturbative- the metallic samples exhibit oscillations in the reflectivity amplitude. The period of these oscillations varies with the probe wavelength but not with the pump wavelength. The oscillations exhibit a decay time as long as 10 nsec.

Paper Details

Date Published: 7 November 2002
PDF: 8 pages
Proc. SPIE 4811, Superconducting and Related Oxides: Physics and Nanoengineering V, (7 November 2002); doi: 10.1117/12.453707
Show Author Affiliations
Michael L. Schneider, Univ. of Wisconsin/Madison (United States)
S. Rast, Univ. of Wisconsin/Madison (United States)
Marshall Onellion, Univ. of Wisconsin/Madison (United States)
Jure Demsar, Los Alamos National Lab. (United States)
Antoinette J. Taylor, Los Alamos National Lab. (United States)
Yu D. Glinka, Vanderbilt Univ. (United States)
Norman H. Tolk, Vanderbilt Univ. (United States)
Yuhang Ren, College of William and Mary (United States)
Gunter Luepke, College of William and Mary (United States)
A. Klimov, Institute of Physics (Poland)
Univ. of Rochester (United States)
Ying Xu, Univ. of Rochester (United States)
Roman Sobolewski, Institute of Physics (Poland)
Univ. of Rochester (United States)
Weidong Si, The Pennsylvania State Univ. (United States)
X. H. Zeng, The Pennsylvania State Univ. (United States)
A. Soukiassian, The Pennsylvania State Univ. (United States)
Xiaoxing Xi, The Pennsylvania State Univ. (United States)
M. Abrecht, Ecole Polytechnique Federale de Lausanne (Switzerland)
Daniel Ariosa, Ecole Polytechnique Federale de Lausanne (Switzerland)
Davor Pavuna, Ecole Polytechnique Federale de Lausanne (Switzerland)
Recardo Manzke, Humboldt-Univ. zu Berlin (Germany)
J. O. Printz, Univ. of Wisconsin/Milwaukee (United States)
D. K. Parkhurst, Univ. of Wisconsin/Milwaukee (United States)
K. E. Downum, Univ. of Wisconsin/Milwaukee (United States)
P. Guptasarma, Univ. of Wisconsin/Milwaukee (United States)
Ivan Bozovic, Oxxel GmbH (Germany)


Published in SPIE Proceedings Vol. 4811:
Superconducting and Related Oxides: Physics and Nanoengineering V
Ivan Bozovic; Davor Pavuna, Editor(s)

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