Cryogenic performance of semiconducting Y–Ba–Cu–O for infrared detection

Pyroelectric effect in Y–Ba–Cu–O thin films under laser illumination

The thermoelectric response of amorphous, semiconducting Y–Ba–Cu–O thin films was investigated by illumination with 150 ps optical pulses at 1064 nm and with a continuous wave at 493 nm ~argon laser!. The measured unbiased voltage response was consistent with pyroelectricity. At high pulse energies, the voltage response saturated due to the saturation of the spontaneous polarization. The pulsed...

Subpicosecond time-resolved studies of coherent phonon oscillations in thin-film YBa2Cu3O6+x (x0.4)

We report the results of the first time-resolved observation of impulsively generated coherent optical phonon oscillations in the semiconducting cuprate compound YBa,Cu,O, +x (x < 0.4). The oscillations, which were probed through time-resolved transmissivity modulation, had a period of 237 fs at room temperature, corresponding to a Raman active mode of A ig symmetry at 142 cm ‘. No oscillations...

Far - infrared c - axis conductivity of flux - grown Y 1 − x Pr x Ba 2 Cu 3 O 7 single crystals studied by spectral ellipsometry

Superconducting and structural properties of plasma sprayed Y-Ba-Cu-O layers deposited on metallic substrates*

The properties of plasma sprayed Y-Ba-Cu-O coatings deposited on metallic substrates are studied. Stainless steel, nickel steels and pure nickel are used as substrate. Y-Ba-Cu-O deposited on stainless steel and nickel steel reacts with the substrate. This interaction can be suppressed by using an yttria-stabilized zirconia (YsZ) diffusion barrier. However, after heat treatment the Y-Ba-Cu-O lay...

Nonequilibrium kinetic inductive response of Y–Ba–Cu–O photodetectors

We present a comprehensive study of the light-induced transient nonequilibrium kinetic inductive response of high-quality, epitaxial Y–Ba–Cu–O (YBCO) thin films. The test structures consisted of 20–30 μm wide coplanar strip (CPS) transmission lines with 7–10 μm separation, patterned in 100 nm thick YBCO films grown on MgO and LaAlO3 substrates. Each CPS structure contained a 5 μm wide, 7–10 μm ...