Detection of single optical photons with STJ detectors in RIKEN

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• 作者：Shigetomo Shiki ; Hiromi Sato ; Yoshiyuki Takizawa ; Toru Taino ; Chiko Otani ; Hirohiko M. Shimizu
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2004
• 出版时间：11 March 2004
• 年：2004
• 卷：520
• 期：1-3
• 页码：530-532
• 全文大小：212 K

文摘

We fabricated high quality Nb/Al/AlO_x/Al/Nb superconducting tunnel junction (STJ) detectors in RIKEN, and succeeded detecting single optical photons. The normal resistance of the STJ device was 2×10⁻⁶ Ω cm² and the ratio of normal resistance and dynamic resistance (Rn/Rd) at 0.2 mV was 10⁻⁵ operated at 0.35 K. The intrinsic energy resolution for 2.64 eV(470 nm) photon was 1.0 eV. Good linearity was observed.