We report on a study of the residual absorption of high temperature superconductors (HTS) at THz frequencies. Using transmission Fabry-Perot interferometry, we determined both, real and imaginary part of the conductivity. We especially studied YBCO thin films. We found, that the dynamical conductivity varied strongly from sample to sample. As a main result we find, that the absorptivity increases at frequencies above 1 THz much weaker than quadratically, i.e. the (omega) ² behavior of the absorptivity at microwave frequencies is not continued in the THz frequency range.

Date Published: 10 June 1996
PDF: 6 pages
Proc. SPIE 2696, Spectroscopic Studies of Superconductors, (10 June 1996); doi: 10.1117/12.241770

Published in SPIE Proceedings Vol. 2696:
Spectroscopic Studies of Superconductors
Ivan Bozovic; Dirk van der Marel, Editor(s)