TY - JOUR
T1 - Tuning of strong nonlinearity in radio-frequency superconducting-quantum-interference-device meta-atoms
AU - Zack, Ethan
AU - Zhang, Daimeng
AU - Trepanier, Melissa
AU - Cai, Jingnan
AU - Tai, Tamin
AU - Lazarides, Nikos
AU - Hizanidis, Johanne
AU - Anlage, Steven M.
N1 - Funding Information:
The work at University of Maryland was funded by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DE-SC0018788. We acknowledge use of facilities at the Maryland Quantum Materials Center and the Maryland NanoCenter. J.H. and N.L. acknowledge support from the General Secretariat for Research and Technology and the Hellenic Foundation for Research and Innovation (Grant No. 203).
Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/4
Y1 - 2022/4
N2 - Strong nonlinearity of a self-resonant radio-frequency (rf) superconducting-quantum-interference-device (SQUID) meta-atom is explored via intermodulation (IM) measurements. Previous work in zero dc magnetic flux showed a sharp onset of IM response as the frequency sweeps through the resonance. A second onset at higher frequency was also observed, creating a prominent gap in the IM response. By extending those measurements to nonzero dc flux, different dynamics are revealed, including dc flux tunability of the aforementioned gaps and enhanced IM response near geometric resonance of the rf SQUID. These features observed experimentally are understood and analyzed theoretically through a combination of a steady-state analytical modeling and a full numerical treatment of the rf SQUID dynamics. The latter in addition predicts the presence of chaos in narrow parameter regimes. The understanding of intermodulation in rf SQUID metamaterials is important for producing low-noise amplification of microwave signals and tunable filters.
AB - Strong nonlinearity of a self-resonant radio-frequency (rf) superconducting-quantum-interference-device (SQUID) meta-atom is explored via intermodulation (IM) measurements. Previous work in zero dc magnetic flux showed a sharp onset of IM response as the frequency sweeps through the resonance. A second onset at higher frequency was also observed, creating a prominent gap in the IM response. By extending those measurements to nonzero dc flux, different dynamics are revealed, including dc flux tunability of the aforementioned gaps and enhanced IM response near geometric resonance of the rf SQUID. These features observed experimentally are understood and analyzed theoretically through a combination of a steady-state analytical modeling and a full numerical treatment of the rf SQUID dynamics. The latter in addition predicts the presence of chaos in narrow parameter regimes. The understanding of intermodulation in rf SQUID metamaterials is important for producing low-noise amplification of microwave signals and tunable filters.
UR - https://www.scopus.com/pages/publications/85128768273
U2 - 10.1103/PhysRevE.105.044202
DO - 10.1103/PhysRevE.105.044202
M3 - Article
C2 - 35590567
AN - SCOPUS:85128768273
SN - 1539-3755
VL - 105
JO - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
JF - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
IS - 4
M1 - 044202
ER -