Antenna-coupled graphene josephson-junction terahertz detector
Antenna-coupled graphene josephson-junction terahertz detector
复制标题
天线耦合石墨烯约瑟夫森结太赫兹探测器
DOI：
10.1557/s43580-023-00546-w
复制
发表时间：
2023
期刊：
影响因子：
0.8
通讯作者：
R. Peale
中科院分区：
文献类型：
--
作者：
F. J. González;M. Lodge;M. Ishigami;R. Klemm;Amit Rathod;Kirsten L. Lina;Anna C. Bowman;Francisco Hernandez;C. Fredricksen;C. Cariker;R. Peale
未来的传感应用和量子信息系统需要高灵敏度、宽调谐的探测器。用于这些挑战的有希望的材料包括堆叠的石墨烯片，其在其平面内对称轴之间具有“神奇”扭转角。这种材料显示出超导性，转变温度约为2 K。我们研究了一种基于天线耦合魔角扭转石墨烯约瑟夫森结的太赫兹和毫米波快速灵敏探测器的设计。所考虑的非测辐射热检测机制取决于当AC电流被驱动通过结时最大零电压DC电流的减小。有限元电动模拟有利于对数周期，方形螺旋，阿基米德螺旋天线设计的蝴蝶结。响应度，噪声等效功率，和单光子探测的前景进行了估计。图形摘要石墨烯片堆叠“魔术”扭曲角显示超导性。约瑟夫森结可以通过选择性选通来创建。我们研究了一种非测辐射热检测机制，该机制可以同时实现高速度和高灵敏度，并可能应用于5G频段的量子密码学。每6 ns 1个光子的噪声等效光子通量是THz和mm波的投影灵敏度。
Highly sensitive, broadly tunable detectors are needed for future sensing applications and quantum information systems. A promising material for these challenges comprises stacked graphene sheets having a “magic” twist angle between their in-plane symmetry axes. This material displays superconductivity with a ~ 2 K transition temperature. We investigate a proposed design for a fast and sensitive detector of THz and mm-waves based on antenna-coupled magic-angle-twist-graphene Josephson junctions. The considered non-bolometric detection mechanism depends on the decrease in the maximum zero-voltage DC current when AC current is driven through the junction. Finite element electrodynamic simulations favor the bowtie over log-periodic, square spiral, and Archimedean spiral antenna designs. Responsivity, noise-equivalent-power, and the prospects for single-photon detection are estimated. Graphical abstract Graphene sheets stacked with “magic” twist angle display superconductivity. Josephson junctions can be created by selective gating. We investigate a non-bolometric detection mechanism that promises simultaneous high speed and sensitivity, with potential application to quantum cryptography in the 5G band. A noise-equivalent-photon flux of 1 photon every 6 ns is the projected sensitivity for THz and mm-waves.
影响因子：
41.2
作者：
Park, Jeong Min;Cao, Yuan;Jarillo-Herrero, Pablo
通讯作者：
Jarillo-Herrero, Pablo