Spectroscopy of high temperature superconductors at microwave and low far infrared frequencies

MARTIN C. NUSS; K. W. GOOSSEN; P. M. MANKIEWICH; R. E. HOWARD

International Quantum Electronics Conference
OSA Technical Digest (Optica Publishing Group, 1990),
paper JTUD2

Spectroscopy of high temperature superconductors at microwave and low far infrared frequencies

MARTIN C. NUSS, K. W. GOOSSEN, P. M. MANKIEWICH, and R. E. HOWARD

International Quantum Electronics Conference 1990

Anaheim, California United States
21–25 May 1990
ISBN: 1-55752-145-X

From the session
Joint Symposium on Ultrafast Optoelectronics: 3–High Tc Superconductors: Semiconductors (JTUD)

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M. C. NUSS, K. W. GOOSSEN, P. M. MANKIEWICH, and R. E. HOWARD, "Spectroscopy of high temperature superconductors at microwave and low far infrared frequencies," in International Quantum Electronics Conference, A. Owyoung, C. Shank, S. Chu, and E. Ippen, eds., Vol. 8 of OSA Technical Digest (Optica Publishing Group, 1990), paper JTUD2.

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Abstract

We study the surface resistance and reactance of high quality YBa₂Cu₃O₇ superconducting films in a transmission line geometry with electrical pulses of ~1-ps duration.¹ The spectrum of these extremely short electrical transients extends from dc to ~1 THz and allows measurement of the complex surface impedance of the super conductor over the same bandwidth. Compared to reflectivity measurements, the transmission line geometry offers the advantage of long interaction length, so that the surface Impedance can be measured with high accuracy even for low temperatures.

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