Report
Tuning of Strong Nonlinearity in rf SQUID Meta-Atoms
| العنوان: | Tuning of Strong Nonlinearity in rf SQUID Meta-Atoms |
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| المؤلفون: | Zack, Ethan, Zhang, Daimeng, Trepanier, Melissa, Cai, Jingnan, Tai, Tamin, Lazarides, Nikos, Hizanidis, Johanne, Anlage, Steven M. |
| المصدر: | Phys. Rev. E 105, 044202 (2022) |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter Nonlinear Sciences |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity, Condensed Matter - Mesoscale and Nanoscale Physics, Nonlinear Sciences - Chaotic Dynamics |
| الوصف: | Strong nonlinearity of a self-resonant radio frequency superconducting quantum interference device (rf-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, new dynamics are revealed, including: dc flux tunabililty 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. Comment: 14 pages, 9 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevE.105.044202 |
| URL الوصول: | http://arxiv.org/abs/2201.02671 |
| رقم الانضمام: | edsarx.2201.02671 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevE.105.044202 |
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