Propagation of terahertz bandwidth electrical pulses on YBa2Cu3O7−δ transmission lines on lanthanum aluminate

We study the propagation of terahertz bandwidth electrical pulses on high critical current density c‐axis oriented YBa2Cu3O7−δ (YBCO) coplanar transmission lines deposited epitaxially on the low dielectric loss substrate lanthanum aluminate (LaAlO3). The losses on the YBCO transmission line are lower than on an equivalent gold line on the same substrate at temperatures below 50 K. At higher temperatures, absorption and dispersion of the ultrashort electrical pulses are observed in reasonable agreement with Mattis–Bardeen theory.

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

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

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

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

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

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

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

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

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

[10]  Greene,et al.  Direct measurement of the temperature-dependent magnetic penetration depth in Y-Ba-Cu-O crystals. , 1989, Physical review letters.

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

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

[13]  Sears,et al.  Observation of a narrow superconducting transition at 6 GHz in crystals of YBa2Cu3O7. , 1988, Physical review. B, Condensed matter.

[14]  K. Button,et al.  Infrared and Millimeter Waves , 1983 .

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

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

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