Optoelectronic generation and detection of single‐flux‐quantum pulses
作者:
Chia‐Chi Wang,
Marc Currie,
Douglas Jacobs‐Perkins,
Marc J. Feldman,
Roman Sobolewski,
Thomas Y. Hsiang,
期刊:
Applied Physics Letters
(AIP Available online 1995)
卷期:
Volume 66,
issue 24
页码: 3325-3327
ISSN:0003-6951
年代: 1995
DOI:10.1063/1.113745
出版商: AIP
数据来源: AIP
摘要:
We report on thedirectobservation of a single‐flux‐quantum (SFQ) pulse. The response of a metal–semiconductor–metal photodiode to a femtosecond laser pulse was used to switch Josephson junctions and to generate an SFQ voltage pulse on a superconducting microstrip line. The detailed shape of the pulse was measured optoelectronically, using a cryogenic electro‐optic sampling system. The measured SFQ pulse had a width of 3.2 ps, an amplitude of 0.67 mV, and a total pulse content of 2.1±0.2 mV×ps, corresponding to the quantum of magnetic fluxh/2e. With larger excitation, multiple SFQ pulses were observed. Numerical simulations are shown to be qualitatively similar to our experimental results. ©1995 American Institute of Physics.
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