Picosecond optical response of high-Tc superconducting ultrathin films

L. Shi; G. L. Huang; C. Lehane; D. Kim; H. S. Kwok; J. Swiatkiewicz; J. Swiatkiewicz; G. C. Xu; G. C. Xu; P. N. Prasad; P. N. Prasad

Quantum Electronics and Laser Science Conference
OSA Technical Digest (Optica Publishing Group, 1993),
paper QThH33

Picosecond optical response of high-T_c superconducting ultrathin films

L. Shi, G. L. Huang, C. Lehane, D. Kim, H. S. Kwok, J. Swiatkiewicz, G. C. Xu, and P. N. Prasad

Quantum Electronics and Laser Science Conference 1993

Baltimore, Maryland United States
2–7 May 1993
ISBN: 1-55752-302-9

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L. Shi, G. L. Huang, C. Lehane, D. Kim, H. S. Kwok, J. Swiatkiewicz, G. C. Xu, and P. N. Prasad, "Picosecond optical response of high-Tc superconducting ultrathin films," in Quantum Electronics and Laser Science Conference, D. Auston, D. Steel, T. Heinz, and G. Stegeman, eds., Vol. 12 of OSA Technical Digest (Optica Publishing Group, 1993), paper QThH33.

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Abstract

Nonequilibrium properties of superconductors is a very important area of interest and has been studied extensively recently. Because of the anisotropy and short coherence length of the high-T_c cuprates, conventional techniques, such as the double-junction method, are not applicable. In our experiment photons are used to generate nonequilibrium QP’s and phonons. The ultrafast voltage pulse generated is observed by the autocorrelation method,¹ which eliminates the need for an ultrafast oscilloscope and provides a time resolution equal to the laser pulse duration.

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