Superconducting microstrip single-photon detector with system detection efficiency over 90% at 1550  nm

Xu, Guangzhao; Zhang, Weijun; You, Lixing; Xiong, Jia-Min; Sun, Xing-Qu; Huang, Hao; Ou, Xin; Pan, Yanbin; Lv, Cuicui; Li, Hao; Wang, Zhen; Xie, Xiaoming

doi:10.1364/prj.419514

Cited by 31 publications

(18 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…al. 31 demonstrates that NbN can be used in combination with an optical cavity to achieve a high system detection efficiency in small active area SMSPDs. WSi and MoSi are also promising materials for large activearea detectors since the films are amorphous and are thus expected to be very homogeneous.…”

Section: Methodsmentioning

confidence: 99%

Large active-area superconducting microwire detector array with single-photon sensitivity in the near-infrared

Luskin¹,

Schmidt²,

Korzh³

et al. 2023

Preprint

View full text Add to dashboard Cite

Superconducting nanowire single photon detectors (SNSPDs) are the highest-performing technology for time-resolved single-photon counting from the UV to the near-infrared. The recent discovery of single-photon sensitivity in micrometer-scale superconducting wires is a promising pathway to explore for large active area devices with application to dark matter searches and fundamental physics experiments. We present 8-pixel 1mm 2 superconducting microwire single photon detectors (SMSPDs) with 1 µm-wide wires fabricated from WSi and MoSi films of various stoichiometries using electron-beam and optical lithography. Devices made from all materials and fabrication techniques show saturated internal detection efficiency at 1064 nm in at least one pixel, and the best performing device made from silicon-rich WSi shows single-photon sensitivity in all 8 pixels and saturated internal detection efficiency in 6/8 pixels. This detector is the largest reported active-area SMSPD or SNSPD with near-IR sensitivity published to date, and the first report of an SMSPD array. By further optimizing the photolithography techniques presented in this work, a viable pathway exists to realize larger devices with cm 2 -scale active area and beyond.

show abstract

Section: Methodsmentioning

confidence: 99%

Large active-area superconducting microwire detector array with single-photon sensitivity in the near-infrared

Luskin¹,

Schmidt²,

Korzh³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…[ 3,87–92 ] Interestingly, superconducting microwire (with wire width beyond the typical value of ≈100 nm for SNSPD) detectors have recently been probed to show single‐photon sensitivity at 1550 nm. [ 93,94 ] Due to the smaller dynamic inductance, high current density, and easier fabrication process, superconducting microwire would provide opportunities for mass production of large‐active‐area and fast‐frequency‐response SPDs. 1D Avalanche Nanowires: Though 1D superconducting nanowire SPDs offer superior photon‐counting capability, their high cost and cryogenic operation limit their widespread applications. [ 95 ] So, room‐temperature 1D nanowire SPDs based on other working mechanisms are urgently needed.…”

Section: Spds Based On Low‐dimensional Materialsmentioning

confidence: 99%

Section: Spds Based On Low‐dimensional Materialsmentioning

confidence: 99%

Emerging Single‐Photon Detectors Based on Low‐Dimensional Materials

Wang

Guo

Miao

et al. 2021

Small

View full text Add to dashboard Cite

Single‐photon detectors (SPDs) that can sense individual photons are the most sensitive instruments for photodetection. Established SPDs such as conventional silicon or III–V compound semiconductor avalanche diodes and photomultiplier tubes have been used in a wide range of time‐correlated photon‐counting applications, including quantum information technologies, in vivo biomedical imaging, time‐of‐flight 3D scanners, and deep‐space optical communications. However, further development of these fields requires more sophisticated detectors with high detection efficiency, fast response, and photon‐number‐resolving ability, etc. Thereby, significant efforts have been made to improve the performance of conventional SPDs and to develop new photon‐counting technologies. In this review, the working mechanisms and key performance metrics of conventional SPDs are first summarized. Then emerging photon‐counting detectors (in the visible to infrared range) based on 0D quantum dots, 1D quantum nanowires, and 2D layered materials are discussed. These low‐dimensional materials exhibit many exotic properties due to the quantum confinement effect. And photodetectors built from these nD‐materials (n = 0, 1, 2) can potentially be used for ultra‐weak light detection. By reviewing the status and discussing the challenges faced by SPDs, this review aims to provide future perspectives on the research directions of emerging photon‐counting technologies.

show abstract

“…Recently, superconducting microstrip single-photon detectors (SMSPDs) 36 – 38 have shown saturated sensitivity to near-infrared single photons and have demonstrated over 90% system detection efficiency using low-energy-gap WSi 38 or ion-irradiated NbN 37 . SNSPDs and SMSPDs operate in a similar manner with respect to photon-number resolution.…”

Section: Introductionmentioning

confidence: 99%

Large-inductance superconducting microstrip photon detector enabling 10 photon-number resolution

Kong,

Zhang,

Liu

et al. 2024

Adv. Photon.

Self Cite

View full text Add to dashboard Cite

.Efficient and precise photon-number-resolving detectors are essential for optical quantum information science. Despite this, very few detectors have been able to distinguish photon numbers with both high fidelity and a large dynamic range, all while maintaining high speed and high timing precision. Superconducting nanostrip-based detectors excel at counting single photons efficiently and rapidly, but face challenges in balancing dynamic range and fidelity. Here, we have pioneered the demonstration of 10 true photon-number resolution using a superconducting microstrip detector, with readout fidelity reaching an impressive 98% and 90% for 4-photon and 6-photon events, respectively. Furthermore, our proposed dual-channel timing setup drastically reduces the amount of data acquisition by 3 orders of magnitude, allowing for real-time photon-number readout. We then demonstrate the utility of our scheme by implementing a quantum random-number generator based on sampling the parity of a coherent state, which guarantees inherent unbiasedness, robustness against experimental imperfections and environmental noise, as well as invulnerability to eavesdropping. Our solution boasts high fidelity, a large dynamic range, and real-time characterization for photon-number resolution and simplicity with respect to device structure, fabrication, and readout, which may provide a promising avenue towards optical quantum information science.

show abstract

Superconducting microstrip single-photon detector with system detection efficiency over 90% at 1550 nm

Cited by 31 publications

References 47 publications

Large active-area superconducting microwire detector array with single-photon sensitivity in the near-infrared

Large active-area superconducting microwire detector array with single-photon sensitivity in the near-infrared

Emerging Single‐Photon Detectors Based on Low‐Dimensional Materials

Large-inductance superconducting microstrip photon detector enabling 10 photon-number resolution

Contact Info

Product

Resources

About