Superconducting Nanowire Single-Photon Detector With a System Detection Efficiency Over 80% at 940-nm Wavelength
Implementations of quantum information require single-photon detectors (SPDs) with high detection efficiency (DE) at a wavelength of 940 nm, which is a challenge for the available semiconducting SPDs. Superconducting nanowire SPDs (SNSPDs) are capable of detecting visible and near-infrared single ph...
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IEEE
2016-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/7434560/ |
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| author | W. J. Zhang H. Li L. X. You J. Huang Y. H. He L. Zhang X. Y. Liu S. J. Chen Z. Wang X. M. Xie |
| author_facet | W. J. Zhang H. Li L. X. You J. Huang Y. H. He L. Zhang X. Y. Liu S. J. Chen Z. Wang X. M. Xie |
| author_sort | W. J. Zhang |
| collection | DOAJ |
| description | Implementations of quantum information require single-photon detectors (SPDs) with high detection efficiency (DE) at a wavelength of 940 nm, which is a challenge for the available semiconducting SPDs. Superconducting nanowire SPDs (SNSPDs) are capable of detecting visible and near-infrared single photons with high DE. However, these detection capabilities place stringent design requirements on the cavity and nanowire geometry structures. We design, fabricate, and measure SNSPDs with high DE optimized for the 940-nm wavelength. The NbN SNSPDs were fabricated on 1-D photonic crystals for high optical absorptance. By tuning the filling factor of the nanowire through numerical simulations and experiments, we were able to obtain an SNSPD (7 nm thick, 125 nm width, and 0.57 filling factor, as well as active area of <inline-formula> <tex-math notation="LaTeX">$18\ast 18\ \mu\text{m}$</tex-math></inline-formula>) with a saturated system DE of 83.6 <inline-formula> <tex-math notation="LaTeX">$\pm$</tex-math></inline-formula> 3.7%, at a dark count rate of 10 Hz, and a low polarization dependence of 1.17 <inline-formula> <tex-math notation="LaTeX">$\pm$</tex-math></inline-formula> 0.02. To our best knowledge, this is the highest value reported for NbN SNSPDs at 940-nm wavelength. The availability of an SNSPD with high system DE at 940 nm may have a profound impact in the field of photonic quantum technologies, such as multiphoton entanglement. |
| format | Article |
| id | doaj-art-080f3aaf575c4ed58115fa4bb93d5b36 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-080f3aaf575c4ed58115fa4bb93d5b362025-08-20T03:31:23ZengIEEEIEEE Photonics Journal1943-06552016-01-01821810.1109/JPHOT.2016.25428387434560Superconducting Nanowire Single-Photon Detector With a System Detection Efficiency Over 80% at 940-nm WavelengthW. J. Zhang0H. Li1L. X. You2J. Huang3Y. H. He4L. Zhang5X. Y. Liu6S. J. Chen7Z. Wang8X. M. Xie9State Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Beijing, ChinaState Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Beijing, ChinaState Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Beijing, ChinaState Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Beijing, ChinaState Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Beijing, ChinaState Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Beijing, ChinaState Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Beijing, ChinaState Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Beijing, ChinaState Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Beijing, ChinaState Key Lab. of Functional Mater. for Inf., Shanghai Inst. of Microsyst. & Inf. Technol., Beijing, ChinaImplementations of quantum information require single-photon detectors (SPDs) with high detection efficiency (DE) at a wavelength of 940 nm, which is a challenge for the available semiconducting SPDs. Superconducting nanowire SPDs (SNSPDs) are capable of detecting visible and near-infrared single photons with high DE. However, these detection capabilities place stringent design requirements on the cavity and nanowire geometry structures. We design, fabricate, and measure SNSPDs with high DE optimized for the 940-nm wavelength. The NbN SNSPDs were fabricated on 1-D photonic crystals for high optical absorptance. By tuning the filling factor of the nanowire through numerical simulations and experiments, we were able to obtain an SNSPD (7 nm thick, 125 nm width, and 0.57 filling factor, as well as active area of <inline-formula> <tex-math notation="LaTeX">$18\ast 18\ \mu\text{m}$</tex-math></inline-formula>) with a saturated system DE of 83.6 <inline-formula> <tex-math notation="LaTeX">$\pm$</tex-math></inline-formula> 3.7%, at a dark count rate of 10 Hz, and a low polarization dependence of 1.17 <inline-formula> <tex-math notation="LaTeX">$\pm$</tex-math></inline-formula> 0.02. To our best knowledge, this is the highest value reported for NbN SNSPDs at 940-nm wavelength. The availability of an SNSPD with high system DE at 940 nm may have a profound impact in the field of photonic quantum technologies, such as multiphoton entanglement.https://ieeexplore.ieee.org/document/7434560/Niobium nitride (NbN)superconducting nanowire single-photon detectors (SNSPDs)system detection efficiencyquantum information |
| spellingShingle | W. J. Zhang H. Li L. X. You J. Huang Y. H. He L. Zhang X. Y. Liu S. J. Chen Z. Wang X. M. Xie Superconducting Nanowire Single-Photon Detector With a System Detection Efficiency Over 80% at 940-nm Wavelength IEEE Photonics Journal Niobium nitride (NbN) superconducting nanowire single-photon detectors (SNSPDs) system detection efficiency quantum information |
| title | Superconducting Nanowire Single-Photon Detector With a System Detection Efficiency Over 80% at 940-nm Wavelength |
| title_full | Superconducting Nanowire Single-Photon Detector With a System Detection Efficiency Over 80% at 940-nm Wavelength |
| title_fullStr | Superconducting Nanowire Single-Photon Detector With a System Detection Efficiency Over 80% at 940-nm Wavelength |
| title_full_unstemmed | Superconducting Nanowire Single-Photon Detector With a System Detection Efficiency Over 80% at 940-nm Wavelength |
| title_short | Superconducting Nanowire Single-Photon Detector With a System Detection Efficiency Over 80% at 940-nm Wavelength |
| title_sort | superconducting nanowire single photon detector with a system detection efficiency over 80 x0025 at 940 nm wavelength |
| topic | Niobium nitride (NbN) superconducting nanowire single-photon detectors (SNSPDs) system detection efficiency quantum information |
| url | https://ieeexplore.ieee.org/document/7434560/ |
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