Accession Number:

AD0855158

Title:

Quantum Interferometer. Heterodyne Detection with Superconducting Point Contacts and Enhanced Heterodyne Signals from Tightly-Coupled Contacts.

Descriptive Note:

Quarterly technical rept. no. 6, 15 Jan-15 Jun 69,

Corporate Author:

PHILCO-FORD CORP NEWPORT BEACH CA AERONUTRONIC DIV

Personal Author(s):

Report Date:

1969-06-15

Pagination or Media Count:

20.0

Abstract:

Several modes of operation of point contacts as heterodyne detectors in the frequency range 0 to ten to the plus ten hz were investigated experimentally. A point contact in a superconducting loop, under the application of two externally-generated a-c fields, behaved as expected on the basis of previous work. Likewise, a point contact in a partly-resistive loop, in which an externally-generated signal is heterodyned with the Josephson oscillation of the contact, gave the expected results. On the other hand, an anomalously large heterodyne signal was obtained from a pair of closely-coupled Josephson-oscillating contacts. No explanation of this result is offered, but it appears that a sort of amplification of the heterodyne signal is effected when the Josephson frequencies are larger than the heterodyne frequency. Author

Subject Categories:

  • Electrical and Electronic Equipment
  • Solid State Physics
  • Electromagnetic Pulses

Distribution Statement:

APPROVED FOR PUBLIC RELEASE