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Fractal superconducting nanowire single-photon detectors with reduced polarization sensitivity
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- Chi, Xiaoming (författare)
- Tianjin Univ, Sch Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China.;Minist Educ, Key Lab Optoelect Informat Sci & Technol, Tianjin 300072, Peoples R China.
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- Zou, Kai (författare)
- Tianjin Univ, Sch Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China.;Minist Educ, Key Lab Optoelect Informat Sci & Technol, Tianjin 300072, Peoples R China.
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- Gu, Chao (författare)
- Tianjin Univ, Sch Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China.;Minist Educ, Key Lab Optoelect Informat Sci & Technol, Tianjin 300072, Peoples R China.
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- Tianjin Univ, Sch Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China;Minist Educ, Key Lab Optoelect Informat Sci & Technol, Tianjin 300072, Peoples R China. Kvant- och biofotonik (creator_code:org_t)
- OPTICAL SOC AMER, 2018
- 2018
- Engelska.
- Ingår i: Optics Letters. - : OPTICAL SOC AMER. - 0146-9592 .- 1539-4794. ; 43:20, s. 5017-5020
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- We demonstrate superconducting nanowire single-photon detectors (SNSPDs) based on a fractal design of the nanowires to reduce the polarization sensitivity of detection efficiency. We patterned niobium titanium nitride thin films into Peano curves with a linewidth of 100 nm and integrated the nanowires with optical microcavities to enhance their optical absorption. At a base temperature of 2.6 K, the fractal SNSPD exhibited a polarization-maximum device efficiency of 67% and a polarization-minimum device efficiency of 61% at a wavelength of 1550 nm. Therefore, the polarization sensitivity, defined as their ratio, was 1.1, lower than the polarization sensitivity of the SNSPDs in the meander design. The reduced polarization sensitivity of the detector could be maintained for higher-order spatial modes in multimode optical fibers and could tolerate misalignment between the optical mode and the detector. This fractal design is applicable to both amorphous and polycrystalline materials that are commonly used for making SNSPDs.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Annan teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Other Engineering and Technologies (hsv//eng)
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- art (ämneskategori)
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- Chi, Xiaoming
- Zou, Kai
- Gu, Chao
- Zichi, Julien
- Cheng, Yuhao
- Hu, Nan
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- Lan, Xiaojian
- Chen, Shufan
- Lin, Zuzeng
- Zwiller, Val
- Hu, Xiaolong
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