Fast Uncooled BiPbSrCaCuO Detectors
Photoresponse of BiPbSrCaCuO superconductor films was studied at normal state temperatures. At room temperature, responsivity in the range of 10 – 100 V/MW was seen to remain constant over at least 8 orders of magnitude of incident power. Detectors were manufactured on films with a thickness as small as 20 nm, showing a time constant shorter than 10 ns. Investigation of photoresponse characteristics showed consistency with a tensorial Seebeck effect in off c-axis grown films. These characteristics suggest that uncooled BiPbSrCaCuO films may be useful replacements for pyroelectric power meters and photon drag detectors.
KeywordsFall Time Normal State Temperature Power Pulse Mode Photoresponse Characteristic Measure Time Constant
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- 4.L. Ngo Phong, I. Shih, and P. Laou, IR reflectance and responsivity of PbBiSrCaCuO films, SPIE2269:131(1994).Google Scholar