Abstract
We create a nonequilibrium distribution of quasiparticles in superconducting YBa2Cu3O7−δ (YBCO) thin films using 150-fs, 1.5-eV optical pulses. The subsequent interplay between the superfluid and quasiparticle dynamics is investigated with coherent terahertz (THz) spectroscopy with the ultimate goal of understanding the character of the excited quasiparticles, their decay channels and relaxation times.
© 1999 Optical Society of America
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