High frequency coupling coefficient between the coplanar resonator and radio frequency SQUID

Citation
Hr. Yi et al., High frequency coupling coefficient between the coplanar resonator and radio frequency SQUID, IEEE APPL S, 9(2), 1999, pp. 4400-4403
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
ISSN journal
10518223 → ACNP
Volume
9
Issue
2
Year of publication
1999
Part
3
Pages
4400 - 4403
Database
ISI
SICI code
1051-8223(199906)9:2<4400:HFCCBT>2.0.ZU;2-B
Abstract
The coupling coefficient (k(2)) between the superconducting coplanar resona tor and the flip chip coupled washer radio frequency SQUID was calculated u sing computer simulation. The coplanar resonator is formed by two coplanar lines surrounding a flux: concentrator,vith each line having a slit. For a 3 mm x 3 mm washer SQUID with a 100 mu m x 100 pm loop coupled to a coplana r resonator with the slits on opposite sides, we estimated k(2)=7.1x10(-3). However, if the same SQUID is coupled to a coplanar resonator with paralle l slits and with a short circuit at the 90 degrees position with respect to the opening slit, k(2) of only 0.5x10(-3) is obtained, which indicates tha t the k(2) is strongly dependent on the resonator layout. The simulation al so shows that k(2) is dependent on the SQUID washer size and the separation distance between the washer SQUID and the coplanar resonator.