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Analyzes femtosecond time-resolved measurements on the photoresponse of an epitaxial Y-Ba-Cu-O superconducting photodetector. Current-voltage biasing conditions between the superconducting and resistive states; Transients that correspond to the nonequilibrium kinetic-inductance and electron-heating response mechanisms; Electron thermalization time measurements.

Examines the picosecond (ps) photoresponse signals from epitaxial YBa[sub 2]Cu[sub 3]O[sub 7-thickness] thin films using five ps and 820 nanometer laser pulses. Appearance of slow component in signal at higher bias currents; Observation of fast transients of 20 ps wide with film thickness of 200 nanometer; Link of fast response to bolometric mechanism.

Investigates the effects of varying values of x and y in (Pb[sub 1-x]Cu[sub x])Sr[sub 2](Y[sub 1-y]Ca[sub y])Cu[sub 2]O[sub 7] films. Deposition of films by laser ablation; Exhibition of unique surface morphology; Effect of substituting calcium for yttrium.

Reports on the preparation of PbSrYCaCuO thin films by laser ablation. Growing of the films in situ at low substrate temperature; Starting composition of the target; Structural analysis; Characteristics of the films.