Title

Microstrip Superconducting Quantum Interference Device Amplifiers with Submicron Josephson Junctions: Enhanced Gain at Gigahertz Frequencies

Author(s)/Creator(s)

Britton Plourde, Syracuse UniversityFollow
M. P. DeFeo, Syracuse University
P. Bhupathi, Syracuse University
Kang Yu, Syracuse University
T. W. Heitmann, Syracuse University

Document Type

Article

Date

8-5-2010

Language

English

Disciplines

Physics

Description/Abstract

We present measurements of an amplifier based on a dc superconducting quantum interference device (SQUID) with submicron Al-AlOx-Al Josephson junctions. The small junction size reduces their self-capacitance and allows for the use of relatively large resistive shunts while maintaining nonhysteretic operation. This leads to an enhancement of the SQUID transfer function compared to SQUIDs with micron-scale junctions. The device layout is modified from that of a conventional SQUID to allow for coupling signals into the amplifier with a substantial mutual inductance for a relatively short microstrip coil. Measurements at 310 mK exhibit gain of 32 dB at 1.55 GHz.

Additional Information

Version with high resolution figures at: this http URL More Information at http://arxiv.org/abs/1008.1036

First author and SU author listed, for additional authors see the article.

Recommended Citation

Plourde, Britton; DeFeo, M. P.; Bhupathi, P.; Yu, Kang; and Heitmann, T. W., "Microstrip Superconducting Quantum Interference Device Amplifiers with Submicron Josephson Junctions: Enhanced Gain at Gigahertz Frequencies" (2010). Physics - All Scholarship. 123.
https://surface.syr.edu/phy/123

Source

Harvested from Arxiv.org

Creative Commons License

This work is licensed under a Creative Commons Attribution 3.0 License.