Superconducting nanowire single-photon detector on dielectric optical films for visible and near infrared wavelengths

Superconducting nanowire single-photon detector on dielectric optical films for visible and near infrared wavelengths
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用于可见光和近红外波长的介电光学薄膜上的超导纳米线单光子探测器

DOI:
10.1088/1361-6668/aa7495
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发表时间:
2017-07
影响因子:
3.6
通讯作者:
Xie Xiaoming
Xie Xiaoming
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
You Lixing;Li Hao;Zhang Weijun;Yang Xiaoyan;Zhang Lu;Chen Sijing;Zhou Hui;Wang Zhen;Xie Xiaoming

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超导纳米线单光子探测器(SNSPD)在1550 nm处的探测效率(DE)在过去几十年中由于光学结构、材料和制造工艺的发展而得到显著提高。我们讨论了一般的光学设计的高效率SNSPD的基础上的介质光学薄膜,可以检测波长从可见光到近红外区域。这种结构表现出接近于1的吸收和良好的不敏感性的细波长和入射角。我们证明了一个SNSPD专门用于检测1064 nm波长的最大系统DE为87.4% ± 3.7%。总结了SNSPD在可见光和近红外波段的探测效率,并与半导体探测器进行了比较。
The detection efficiency (DE) of superconducting nanowire single-photon detectors (SNSPDs) at 1550 nm has been significantly improved in the past decades as a result of evolution of the optical structure, the materials, and the fabrication process. We discuss the general optical design for a high-efficiency SNSPD based on dielectric optical films that can detect wavelengths from visible to near infrared regions. This structure shows close-to-unity absorption and good insensitivity to the fine wavelength and the incident angle. We demonstrate an SNSPD specifically fabricated for the detection of 1064 nm wavelength with a maximal system DE of 87.4% ± 3.7%. The DEs of the SNSPDs for visible and near infrared wavelengths are also summarized and compared with those of semiconducting detectors.
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