Mid-infrared single photon detector with superconductor Mo0.8Si0.2 nanowire

Chen, Qi; Ge, Rui; Zhang, Labao; Li, Feiyan; Zhang, Biao; Jin, Feifei; Han, Hang; Dai, Y.; He, Ge; Fei, Yue; Wang, Xiaohan; Wang, Hao; Jia, Xiaoqing; Zhao, Qingyuan; Tu, Xuecou; Kang, Lin; Chen, Jian; Wu, Peiheng

doi:10.1016/j.scib.2021.02.024

Cited by 38 publications

(14 citation statements)

References 27 publications

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“…SNSPDs were previously shown to achieve high detection efficiencies (>90%) in the near-infrared range (780–1000 nm) , and the telecom bands (1300–1600 nm). − To achieve a high detection efficiency in the 1300–2000 nm range, several factors were optimized: the NbTiN superconducting film composition, the geometry of the superconducting nanowires (as shown in Figure a), and the optical cavity formed by a Au mirror and SiO 2 spacer underneath the superconducting film. Although mid-infrared detectors have been demonstrated for light with wavelengths ranging from 1 to 5 μm , or even 10 μm, these demonstrations either showed a saturated internal efficiency or demonstrated a limited detection efficiency . Moreover, the materials used in most of these demonstrations (apart from) required operation below the base temperature of conventional Gifford–McMahon cryo-coolers, making the development of a compact microscopy system much more difficult.…”

Section: Resultsmentioning

confidence: 99%

Short-Wave Infrared Confocal Fluorescence Imaging of Deep Mouse Brain with a Superconducting Nanowire Single-Photon Detector

Xia

Gevers²,

Fognini³

et al. 2021

ACS Photonics

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Optical microscopy is a valuable tool for in vivo monitoring of biological structures and functions because of its noninvasiveness. However, imaging deep into biological tissues is challenging due to the scattering and absorption of light. Previous research has shown that the two optimal wavelength windows for high-resolution deep mouse brain imaging are around 1300 and 1700 nm. However, one-photon fluorescence imaging in the wavelength region has been highly challenging due to the poor detection efficiency of currently available detectors. To fully utilize this wavelength advantage, we demonstrated here one-photon confocal fluorescence imaging of deep mouse brains with an excitation wavelength of 1310 nm and an emission wavelength within the 1700 nm window. Fluorescence emission at 1700 nm was detected by a custom-built superconducting nanowire single-photon detector (SNSPD) optimized for detection between 1600 nm and 2000 nm with low detection noise and high detection efficiency. With the PEGylated quantum dots and SNSPD both positioned at the optimal imaging window for deep tissue penetration, we demonstrated in vivo one-photon confocal fluorescence imaging at approximately 1.7 mm below the surface of the mouse brain, through the entire cortical column and into the hippocampus region with a low-cost continuous-wave laser source and low excitation power. We further discussed the significance of the staining inhomogeneity in determining the depth limit of one-photon confocal fluorescence imaging. Our work may motivate the further development of long wavelength fluorescent probes, and inspire innovations in high-efficiency, high-gain, and low-noise long wavelength detectors for biological imaging.

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Section: Resultsmentioning

confidence: 99%

Short-Wave Infrared Confocal Fluorescence Imaging of Deep Mouse Brain with a Superconducting Nanowire Single-Photon Detector

Xia

Gevers²,

Fognini³

et al. 2021

ACS Photonics

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“…These measures could equally apply to SatQKD but there is also the possibility of utilising wavelengths with better penetration of partially obscured skies, particularly in the mid to long infrared region of the spectrum [294]. This requires the development of new sources and detectors but some progress has been made in this direction [295][296][297].…”

Section: Impact Of the Atmosphere: Turbulence Noise And Weathermentioning

confidence: 99%

Advances in space quantum communications

Sidhu

Joshi

Gündoğan

et al. 2021

IET Quantum Communication

166

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Concerted efforts are underway to establish an infrastructure for a global quantum Internet to realise a spectrum of quantum technologies. This will enable more precise sensors, secure communications, and faster data processing. Quantum communications are a front-runner with quantum networks already implemented in several metropolitan areas. A number of recent proposals have modelled the use of space segments to overcome range limitations of purely terrestrial networks. Rapid progress in the design of quantum devices have enabled their deployment in space for in-orbit demonstrations. We review developments in this emerging area of space-based quantum technologies and provide a roadmap of key milestones towards a complete, global quantum networked landscape. Small satellites hold increasing promise to provide a cost effective coverage required to realise the quantum Internet. The state of art in small satellite missions is reviewed and the most current in-field demonstrations of quantum cryptography are collated. The important challenges in space quantum technologies that must be overcome and recent efforts to mitigate their effects are summarised. A perspective on future developments that would improve the performance of space quantum communications is included. The authors conclude with a discussion on fundamental physics experiments that could take advantage of a global, space-based quantum network.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…[52][53][54]). These devices are sensitive to the deposit of extremely small amounts of energy, with proven sub-eV thresholds and low dark count rates [24,[55][56][57][58][59][60][61][62]. Under certain conditions, they may even be sensitive to the direction of the deposited momentum [63].…”

mentioning

confidence: 99%

Detecting Sub-GeV Dark Matter with Superconducting Nanowires

et al. 2019

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We propose the use of superconducting nanowires as both target and sensor for direct detection of sub-GeV dark matter. With excellent sensitivity to small energy deposits on electrons, and demonstrated low dark counts, such devices could be used to probe electron recoils from dark matter scattering and absorption processes. We demonstrate the feasibility of this idea using measurements of an existing fabricated tungsten-silicide nanowire prototype with 0.8-eV energy threshold and 4.3 nanograms with 10 thousand seconds of exposure, which showed no dark counts. The results from this device already place meaningful bounds on dark matter-electron interactions, including the strongest terrestrial bounds on sub-eV dark photon absorption to date. Future expected fabrication on larger scales and with lower thresholds should enable probing new territory in the direct detection landscape, establishing the complementarity of this approach to other existing proposals.

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Mid-infrared single photon detector with superconductor Mo0.8Si0.2 nanowire

Cited by 38 publications

References 27 publications

Short-Wave Infrared Confocal Fluorescence Imaging of Deep Mouse Brain with a Superconducting Nanowire Single-Photon Detector

Short-Wave Infrared Confocal Fluorescence Imaging of Deep Mouse Brain with a Superconducting Nanowire Single-Photon Detector

Advances in space quantum communications

Detecting Sub-GeV Dark Matter with Superconducting Nanowires

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