| Autor: |
Xing, X., Balasubramanian, K., Bouscher, S., Zohar, O., Nitzav, Y., Kanigel, A., Hayat, A. |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 7/20/2020, Vol. 117 Issue 3, p1-4, 4p, 1 Color Photograph, 1 Diagram, 3 Graphs |
| Abstrakt: |
Superconducting single-photon detectors have become a very promising infrared photon counting technology. Utilizing high-Tc superconductors to implement photon counters is significantly more practical due to their much higher operating temperatures. We report photoresponse above 85 K of YB a 2 C u 3 O 7 − δ (YBCO) microwires fabricated using selective epitaxial growth (SEG), demonstrating their high photon detection efficiency. SEG does not require post-deposition treatment of the YBCO layer, thus avoiding material damage and degradation, typically occurring in conventional submicrometer YBCO device fabrication. Our results show excellent superconducting performance with a Tc of up to 89 K and a sharp transition width of Δ T ∼ 2 K , as well as a relatively high critical current density Jc of ∼ 5.7 × 10 5 A / c m 2 at 77 K. The optical response of our YBCO microwires, especially the high responsivity of ∼ 3 × 10 3 mV / (nW / u m 2) , paves the way for infrared single-photon detection using high-Tc superconductors. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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