Cascade switching current detectors based on arrays of Josephson junctions
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909752485740544 |
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| author | Cattaneo, Roger Efimov, Artemii E. Shiianov, Kirill I. Kieler, Oliver Krasnov, Vladimir M. |
| author_facet | Cattaneo, Roger Efimov, Artemii E. Shiianov, Kirill I. Kieler, Oliver Krasnov, Vladimir M. |
| contents | Cascade multiplication is a common technique to enhance the sensitivity of photon detectors. In this study, we demonstrate novel cascade-amplified superconducting detectors utilizing arrays of Josephson junctions. The mutual coupling between junctions induces avalanche-like switching of multiple junctions upon photon absorption, leading to cascade amplification of the readout voltage. We present two prototypes featuring either low-Tc linear Nb/NbxSi1-x/Nb arrays, or high-Tc stacked intrinsic Josephson junctions. Both devices exhibit clear antenna effects in microwave directivities, indicating good impedance matching and absorption efficiency. The combination of high absorption efficiency and large cascade amplification has the potential to produce broadband THz sensors with sensitivity exceeding 10^13 V/W. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_16050 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Cascade switching current detectors based on arrays of Josephson junctions Cattaneo, Roger Efimov, Artemii E. Shiianov, Kirill I. Kieler, Oliver Krasnov, Vladimir M. Superconductivity Instrumentation and Detectors Cascade multiplication is a common technique to enhance the sensitivity of photon detectors. In this study, we demonstrate novel cascade-amplified superconducting detectors utilizing arrays of Josephson junctions. The mutual coupling between junctions induces avalanche-like switching of multiple junctions upon photon absorption, leading to cascade amplification of the readout voltage. We present two prototypes featuring either low-Tc linear Nb/NbxSi1-x/Nb arrays, or high-Tc stacked intrinsic Josephson junctions. Both devices exhibit clear antenna effects in microwave directivities, indicating good impedance matching and absorption efficiency. The combination of high absorption efficiency and large cascade amplification has the potential to produce broadband THz sensors with sensitivity exceeding 10^13 V/W. |
| title | Cascade switching current detectors based on arrays of Josephson junctions |
| topic | Superconductivity Instrumentation and Detectors |
| url | https://arxiv.org/abs/2409.16050 |