极低温下高灵敏太赫兹探测阵列的信号读出

doi:10.3969/j.issn.1007-5461.2023.02.008

量子电子学报 ›› 2023, Vol. 40 ›› Issue (2): 267-274.doi: 10.3969/j.issn.1007-5461.2023.02.008

• “太赫兹物理、器件与应用”专辑 • 上一篇下一篇

极低温下高灵敏太赫兹探测阵列的信号读出

姚柏志1 , 石粒力1 , 吴敬波1,2 , 陈健 1,2∗ , 吴培亨 1,2

( 1 南京大学超导电子学研究所, 江苏南京 210023; 2 紫金山实验室, 江苏南京 211111 )

收稿日期:2022-09-24 修回日期:2022-10-25 出版日期:2023-03-28 发布日期:2023-03-28
通讯作者: E-mail: chenj63@nju.edu.cn E-mail:E-mail: chenj63@nju.edu.cn
作者简介:姚柏志 ( 1998 - ), 浙江温州人, 研究生, 主要从事超导量子电容探测器方面的研究。 E-mail: mf20230137@smail.nju.edu.cn
基金资助:
中央高校经费和江苏省电磁波先进调控重点实验室项目

Readout of high-sensitive terahertz detector arrays at low temperature

YAO Bozhi 1 , SHI Lili 1 , WU Jingbo 1,2 , CHEN Jian 1,2∗ , WU Peiheng 1,2

( 1 Research Institute of Superconductor Electronics, Nanjing University, Nanjing 210023, China; 2 Purple Mountain Laboratories, Nanjing 211111, China )

Received:2022-09-24 Revised:2022-10-25 Published:2023-03-28 Online:2023-03-28

摘要/Abstract

摘要： 太赫兹 (THz) 波段的高灵敏探测器在诸多前沿领域中有着巨大的应用价值。超导量子电容探测器 (QCD) 是一种在 THz 波段具备单光子探测能力的高灵敏直接探测器, 且可实现大规模阵列。对阵列而言, 可靠的读出技术是其性能发挥的基本保障。本研究利用零差读出技术进行了 QCD 信号读出与表征。微波同相正交 (IQ) 混频器是零差读出电路的重要组成元件, 故对 IQ 混频器进行了详细表征与校准, 通过排除其不平衡性对探测器信号读出的影响, 提高了测量的可靠性。在此基础上, 对 QCD 的 THz 响应信号进行了测量, 结果显示 QCD 响应信号与理论预期结果高度一致。此外, 所构建的零差读出电路还可用于高灵敏超导微波动态电感探测器 (MKID) 阵列等极低温 (15 mK 以下) 探测器的信号读出, 为高灵敏 THz 探测器的开发奠定了良好的基础, 具有较高的应用价值。

关键词: 光电子学, 零差读出, 高灵敏太赫兹探测阵列, 超导量子电容探测器, 低温, 单光子探测

Abstract: High-sensitive detector arrays in terahertz (THz) band have great application value in many ﬁelds. Quantum capacitance detector (QCD) is one kind of direct detectors with single-photon detection and array capabilities in THz band, which uses frequency division multiplexing, and the array readout technology is relatively simple. For high-sensitive detector arrays, reliable readout technology is the basic guarantee for its superior performance. In this study, QCD signal is measured and characterized by homodyne readout technique. As microwave in-phase quadrature-phase (IQ) mixer is an important component of the homodyne readout circuit, the IQ mixer is characterized and calibrated, and its measurement reliability is improved by eliminating the impact of its imbalance on signal readout. Under this calibration method, the quantum capacitance response signal of QCD is measured, and the results show that the QCD response signal is periodic, which is highly consistent with the expected quantum capacitance eﬀect. In addition, the constructed readout circuit can also be used for signal readout of extremely low temperature (below 15 mK) detectors such as microwave kinetic inductance detector (MKID) arrays, which lays a good foundation for the development of high-sensitive THz detector arrays and has good application value.

Key words: optoelectronics, homodyne readout, high-sensitive THz detector array, superconducting quantum capacitance detector, low temperature, single photon detection

中图分类号:

O441.4

姚柏志 , 石粒力 , 吴敬波, , 陈健 , ∗ , 吴培亨 , . 极低温下高灵敏太赫兹探测阵列的信号读出[J]. 量子电子学报, 2023, 40(2): 267-274.

YAO Bozhi , SHI Lili , WU Jingbo , , CHEN Jian , ∗ , WU Peiheng , . Readout of high-sensitive terahertz detector arrays at low temperature[J]. Chinese Journal of Quantum Electronics, 2023, 40(2): 267-274.

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极低温下高灵敏太赫兹探测阵列的信号读出

Readout of high-sensitive terahertz detector arrays at low temperature

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