Evaluation of YBa2Cu3O7-based microwave kinetic inductance detectors with rewound spiral resonators
Evaluation of YBa2Cu3O7-based microwave kinetic inductance detectors with rewound spiral resonators
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具有重绕螺旋谐振器的基于 YBa2Cu3O7 的微波动感电感探测器的评估
DOI：
10.1088/1742-6596/1054/1/012053
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
K. Nakajima and S. Tanaka
中科院分区：
文献类型：
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作者：
K. Sato;S. Ariyoshi;S. Negishi;S. Hashimoto;H. Mikami;K. Nakajima and S. Tanaka
我们提出了一种基于YBCO的微波动力学电感探测器与重绕条结构（螺旋MKID）适合于成像应用。超导重绕带用作微波谐振器和宽带天线。在10× 10 mm的2-MgO衬底上制作了一个25像素的MKID阵列，宽度为10 μm，每个谐振器的长度略有变化。阵列的微波谐振特性进行了评估，通过测量的散射矩阵元素之一，S 21，使用矢量网络分析仪。在5GHz附近清楚地观察到25个谐振下降;相邻像素之间的频率间隔为13 MHz，标准偏差为5 MHz。由于温度从11 K变化到50 K，每个谐振频率移动了170 MHz。我们发现，具有200 nm厚的膜的YBCO基螺旋MKID在11 K下具有1，200的负载品质因数，在50 K下具有700的负载品质因数。我们将可见光照射到阵列上的单个像素上。所获得的噪声等效功率为10− 9 W/Hz 1/2的量级，而在13 K下的响应时间小于30 ms。阵列在70 K时的响应度比13 K时的响应度大6倍。
We propose a YBCO-based microwave kinetic inductance detector with rewound strip structure (spiral-MKID) suitable for imaging applications. The superconducting rewound strip acts as a microwave resonator and broadband antenna. A 25-pixel MKID array with a width of 10 μm and slightly varying length of each of the resonators was fabricated on a 10× 10 mm 2-MgO substrate. Microwave resonance characteristics of the array were evaluated by measuring one of the scattering-matrix elements, S 21, using a vector network analyser. The 25 resonance dips were clearly observed around 5 GHz; the frequency spacing between adjacent pixels was 13 MHz, with a standard deviation of 5 MHz. Each resonance frequency was shifted by 170 MHz, owing to the temperature change from 11 K to 50 K. We showed that the YBCO-based spiral-MKIDs with 200 nm-thick films have loaded quality factors of 1,200 at 11 K and 700 at 50 K. We irradiated visible light to a single pixel on the array. The obtained noise equivalent power was on the order of 10− 9 W/Hz 1/2, while the response time was smaller than 30 ms at 13 K. The responsivity of the array at 70 K was six times larger than that at 13 K.