Intermodulation in nonlinear SQUID metamaterials: Experiment and theory
Intermodulation in nonlinear SQUID metamaterials: Experiment and theory
复制标题
非线性 SQUID 超材料中的互调：实验与理论
DOI：
10.1103/physrevb.94.174507
复制
发表时间：
2016
影响因子：
3.7
通讯作者：
S. Anlage
中科院分区：
文献类型：
--
作者：
Daimeng Zhang;M. Trepanier;T. Antonsen;E. Ott;S. Anlage
非线性超材料和超导电子学对双音激励的响应对于理解它们作为低噪声放大器和可调谐滤波器的用途至关重要。这类研究的新设置是由射频超导量子干涉器件（rf- squid）制成的超材料。本文通过互调（IM）测量，研究了自谐振rf-SQUID元原子和超材料的双音响应。在共振附近观察到一个令人惊讶的强烈抑制的IM区域。使用两个时间尺度的分析技术，我们提出了一个分析理论，成功地解释了我们的实验观察。该理论预测，可以通过音调功率、中心频率、两个音调之间的频率差和温度来控制IM。这种定量理解可能允许设计具有非常低或非常高的IM响应的rf-SQUID超材料。
The response of nonlinear metamaterials and superconducting electronics to two-tone excitation is critical for understanding their use as low-noise amplifiers and tunable filters. A new setting for such studies is that of metamaterials made of radio frequency superconducting quantum interference devices (rf-SQUIDs). The two-tone response of self-resonant rf-SQUID meta-atoms and metamaterials is studied here via intermodulation (IM) measurement over a broad range of tone frequencies and tone powers. A sharp onset followed by a surprising strongly suppressed IM region near the resonance is observed. Using a two time scale analysis technique, we present an analytical theory that successfully explains our experimental observations. The theory predicts that the IM can be manipulated with tone power, center frequency, frequency difference between the two tones, and temperature. This quantitative understanding potentially allows for the design of rf-SQUID metamaterials with either very low or very high IM response.
影响因子：
16.6
作者：
Jung, P.;Butz, S.;Ustinov, A. V.
通讯作者：
Ustinov, A. V.
影响因子：
4
作者：
P. Jung;S. Butz;S. Shitov;A. Ustinov
通讯作者：
P. Jung;S. Butz;S. Shitov;A. Ustinov