Author/Authors :
Shiki، نويسنده , , Shigetomo and Sato، نويسنده , , Hiromi and Takizawa، نويسنده , , Yoshiyuki and Taino، نويسنده , , Toru and Otani، نويسنده , , Chiko and M. Shimizu، نويسنده , , Hirohiko، نويسنده ,
Abstract :
We fabricated high quality Nb/Al/AlOx/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.
Keywords :
Electronic and magnetic devices , X-Ray , STJ , Gamma-ray detectors , Superconducting optical
