Nonresonant detection of the Josephson radiation 35 GHz from a superconducting thin-film microbridge is reported. The high frequency and the accuracy of these measurements lead to a new important observation: subharmonic energy gap structure in the detected integral power. The maximum integral power measured was as large as 8×10−11 W. Applied Physics Letters is copyrighted by The American Institute of Physics.
Bibliographical noteCopyright (1979) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Hansen, J. B., Levinsen, M. T., Lindelof, P. E., Dueholm, B., Mygind, J., Pedersen, N. F., & Sørensen, O. H. (1979). Subharmonic energy gap structure in the Josephson radiation at 35 GHz from a superconducting thin-film microbridge. Applied Physics Letters, 35(1), 28-30. https://doi.org/10.1063/1.90910