Bolometric response of superconducting YBa 2 Cu 3 O 7-x microbridges

C. J. Haung*, C. Y. Chang, Tseung-Yuen Tseng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


The optical properties of superconducting bolometers have been presented in YBa 2 Cu 3 O 7-x epitaxial films irradiated by a light emission diode with an 0.94 μm wavelength. The better response occurring in the resistive transition region has been shown and studied. A thermal fluctuation on the flux creep behavior can be employed to illustrate the nonlinearity optical current-voltage (I-V) characteristics in the low-resistive region. However, a dissipative mechanism of flux flow should be used in explaining the best response that reveals a linear I-V relation. Measurement of the bridges yielded the bolometric responsivity of approximately 77 V/W, by illuminating a 2 Hz dynamic signal with 0.15 mW. The noise equivalent power has been estimated as 3.2×10 -10 W Hz -0.5 .

Original languageEnglish
Pages (from-to)5786-5791
Number of pages6
JournalJournal of Applied Physics
Issue number12
StatePublished - 1 Dec 1992

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