Investigation of high-temperature superconductors with terahertz bandwidth electrical pulses

The authors summarize recent attempts to propagate ultrashort electrical pulses containing frequency components up to 1 THz on transmission lines made from thin films of the high-temperature superconductor YBa/sub 2/Cu/sub 3/O/sub 7- delta /. Optoelectronic generation of extremely short electrical transients and jitter-free electrooptic detection of the pulse shape and amplitude as they propagate along the superconducting line make it possible to investigate the high-frequency properties of the high-T/sub c/ material with high accuracy because of the the long interaction lengths that are possible on transmission lines. The authors discuss the influence of epitaxy, surface roughness, and magnetic field on the pulse propagation. Important parameters such as the magnetic penetration depth and the superconducting energy gap are directly determined from the experimental data. Finally, the authors compare their results with weak-coupling BCS (Bardeen-Cooper-Schrieffer) theory. >

[1]  D. Mattis,et al.  Theory of the anomalous skin effect in normal and superconducting metals , 1958 .

[2]  H. E. Weaver.  Dielectric properties of single crystals of SrTiO3 at low temperatures , 1959 .

[3]  C. Wen.  Coplanar Waveguide, a Surface Strip Transmission Line Suitable for Nonreciprocal Gyromagnetic Device Applications , 1969 .

[4]  E. W. Williams,et al.  Finite-Boundary Corrections to the Coplanar Waveguide Analysis (Short Papers) , 1973 .

[5]  J. Halbritter,et al.  On surface resistance of superconductors , 1974 .

[6]  Richard L. Kautz,et al.  Picosecond pulses on superconducting striplines , 1978 .

[7]  D. Auston,et al.  Impulse response of photoconductors in transmission lines , 1983 .

[8]  J. Whinnery,et al.  Dispersion of Picosecond Pulses in Coplanar Transmission Lines , 1986 .

[9]  R. Howard,et al.  Reproducible technique for fabrication of thin films of high transition temperature superconductors , 1987 .

[10]  M. Nuss,et al.  1 THz bandwidth probing of devices and integrated circuits , 1987, 1987 International Electron Devices Meeting.

[11]  J. A. Valdmanis,et al.  1 THz-bandwidth proper for high-speed devices and integrated circuits , 1987 .

[12]  William J. Gallagher,et al.  Subpicosecond optoelectronic study of resistive and superconductive transmission lines , 1987 .

[13]  Duling,et al.  Electromagnetic shock waves from transmission lines. , 1987, Physical review letters.

[14]  D. Grischkowsky,et al.  Far infrared spectroscopy with subpicosecond electrical pulses on transmission lines , 1987 .

[15]  Zhang,et al.  Normal- and superconducting-state properties of La1.85Sr0.15CuO4. , 1987, Physical review. B, Condensed matter.

[16]  Naomi J. Halas,et al.  Capacitance free generation and detection of subpicosecond electrical pulses on coplanar transmission lines , 1988 .

[17]  D. K. Lathrop,et al.  High-frequency characterization of thin-film Y-Ba-Cu oxide superconducting transmission lines , 1988 .

[18]  G. S. Lee,et al.  Low-loss substrate for epitaxial growth of high-temperature superconductor , 1988 .

[19]  Gerard Mourou,et al.  Propagation model for ultrafast signals on superconducting dispersive striplines , 1988 .

[20]  A. Segmüller,et al.  Lanthanum gallate substrates for epitaxial high-temperature superconducting thin films , 1988 .

[21]  Martin C. Nuss,et al.  Electrooptical generation and detection of femtosecond electrical transients , 1988 .

[22]  D. K. Lathrop,et al.  Propagation characteristics of picosecond electrical transients on YBa 2 Cu 3 O 7-y transmission lines , 1988 .

[23]  R. Howard,et al.  Processing Techniques for the 93 K Superconductor Ba2YCu3O7 , 1988, Science.

[24]  Hammond,et al.  Upper critical field, fluctuation conductivity, and dimensionality of YBa2Cu3O7-x. , 1988, Physical review. B, Condensed matter.

[25]  R. Howard,et al.  Renormalization of the mean-field superconducting penetration depth in epitaxial YBa2Cu3O7 films. , 1988, Physical review letters.

[26]  D. W. Kisker,et al.  Efficient generation of 480 fs electrical pulses on transmission lines by photoconductive switching in metalorganic chemical vapor deposited CdTe , 1989 .

[27]  T. L. Hylton,et al.  Surface impedance studies of the high-T/sub c/ oxide superconductors , 1989 .

[28]  Grischkowsky,et al.  Observation of electromagnetic shock waves from propagating surface-dipole distributions. , 1989, Physical review letters.

[29]  Keith W. Goossen,et al.  Propagation of terahertz bandwidth electrical pulses on YBa2Cu3O7−δ transmission lines on lanthanum aluminate , 1989 .

[30]  Mark B. Ketchen,et al.  Subpicosecond electrical pulse generation using photoconductive switches with long carrier lifetimes , 1989 .

[31]  J. Whitaker,et al.  Ultrafast response of superconducting transmission lines , 1989 .

[32]  R. V. Dover,et al.  Critical currents and thermally activated flux motion in high-temperature superconductors , 1989 .

[33]  M. Peiniger,et al.  Millimeter wave surface resistance of epitaxially grown YBa2Cu3O7−x thin films , 1989 .

[34]  J. Sun,et al.  Magnetic flux motion and its influence on transport properties of the high Tc oxide superconductors , 1989 .