Metallic coplanar microwave resonators are widely employed at room temperature, but their low-temperature performance has received little attention so far. We characterize compact copper coplanar resonators with multiple modes from 2.5 to 20 GHz at temperatures as low as 5 K. We investigate the influence of center conductor width (20–100 µ m) and coupling gap size (10–50 µ m), and we observe a strong increase of quality factor ( Q ) for wider center conductors, reaching values up to 470. The magnetic-field dependence of the resonators is weak, with a maximum change in Q of 3.5% for an applied field of 7 T. This makes these metallic resonators well suitable for magnetic resonance studies, as we document with electron spin resonance (ESR) measurements at multiple resonance frequencies.
%0 Journal Article
%1 0022-3727-49-39-395501
%A Rahim, Mojtaba Javaheri
%A Lehleiter, Thomas
%A Bothner, Daniel
%A Krellner, Cornelius
%A Koelle, Dieter
%A Kleiner, Reinhold
%A Dressel, Martin
%A Scheffler, Marc
%D 2016
%J Journal of Physics D: Applied Physics
%K coplanar resonators
%N 39
%P 395501
%R 10.1088/0022-3727/49/39/395501
%T Metallic coplanar resonators optimized for low-temperature measurements
%U http://stacks.iop.org/0022-3727/49/i=39/a=395501
%V 49
%X Metallic coplanar microwave resonators are widely employed at room temperature, but their low-temperature performance has received little attention so far. We characterize compact copper coplanar resonators with multiple modes from 2.5 to 20 GHz at temperatures as low as 5 K. We investigate the influence of center conductor width (20–100 µ m) and coupling gap size (10–50 µ m), and we observe a strong increase of quality factor ( Q ) for wider center conductors, reaching values up to 470. The magnetic-field dependence of the resonators is weak, with a maximum change in Q of 3.5% for an applied field of 7 T. This makes these metallic resonators well suitable for magnetic resonance studies, as we document with electron spin resonance (ESR) measurements at multiple resonance frequencies.
@article{0022-3727-49-39-395501,
abstract = {Metallic coplanar microwave resonators are widely employed at room temperature, but their low-temperature performance has received little attention so far. We characterize compact copper coplanar resonators with multiple modes from 2.5 to 20 GHz at temperatures as low as 5 K. We investigate the influence of center conductor width (20–100 µ m) and coupling gap size (10–50 µ m), and we observe a strong increase of quality factor ( Q ) for wider center conductors, reaching values up to 470. The magnetic-field dependence of the resonators is weak, with a maximum change in Q of 3.5% for an applied field of 7 T. This makes these metallic resonators well suitable for magnetic resonance studies, as we document with electron spin resonance (ESR) measurements at multiple resonance frequencies.},
added-at = {2018-01-30T08:36:52.000+0100},
author = {Rahim, Mojtaba Javaheri and Lehleiter, Thomas and Bothner, Daniel and Krellner, Cornelius and Koelle, Dieter and Kleiner, Reinhold and Dressel, Martin and Scheffler, Marc},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/24ffabc607f9c753a9bd5de040e9c0bd7/ulrikeoffenbeck},
doi = {10.1088/0022-3727/49/39/395501},
interhash = {c63dd4db62b874f60cc67337e6274f59},
intrahash = {4ffabc607f9c753a9bd5de040e9c0bd7},
journal = {Journal of Physics D: Applied Physics},
keywords = {coplanar resonators},
number = 39,
pages = 395501,
timestamp = {2018-01-30T07:36:52.000+0100},
title = {Metallic coplanar resonators optimized for low-temperature measurements},
url = {http://stacks.iop.org/0022-3727/49/i=39/a=395501},
volume = 49,
year = 2016
}
