Superconducting single-photon ultrathin NbN film detector

Journal Article · Wed Aug 31 00:00:00 EDT 2005 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2005V035N08ABEH009152· OSTI ID:21470808

Korneev, A A; Minaeva, O V; Rubtsova, Inna A; Milostnaya, I I; Chulkova, G M; Voronov, B M; Smirnov, K V; Seleznev, V A; Gol'tsman, G N ^[1]; Pearlman, A; Slysz, W; Cross, A; Alvarez, P; Verevkin, A; Sobolewski, R ^[2]

---

1. Moscow State Pedagogical University, Moscow (Russian Federation)
2. University of Rochester, Rochester (United States)

Superconducting single-photon ultrathin NbN film detectors are studied. The development of manufacturing technology of detectors and the reduction of their operating temperature down to 2 K resulted in a considerable increase in their quantum efficiency, which reached in the visible region (at 0.56 {mu}m) 30%-40%, i.e., achieved the limit determined by the absorption coefficient of the film. The quantum efficiency exponentially decreases with increasing wavelength, being equal to {approx}20% at 1.55 {mu}m and {approx}0.02% at 5 {mu}m. For the dark count rate of {approx}10{sup -4}s{sup -1}, the experimental equivalent noise power was 1.5x10{sup -20} W Hz{sup -1/2}; it can be decreased in the future down to the record low value of 5x10{sup -21} W Hz{sup -1/2}. The time resolution of the detector is 30 ps. (fourth seminar to the memory of d.n. klyshko)

• OSTI ID: 21470808
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 35, Issue 8; Other Information: DOI: 10.1070/QE2005v035n08ABEH009152; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ABSORPTION
COUNTING RATES
MANUFACTURING
NIOBIUM NITRIDES
PHOTONS
SEMICONDUCTOR DETECTORS
THIN FILMS
TIME RESOLUTION
WAVELENGTHS
BOSONS
ELEMENTARY PARTICLES
FILMS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
NIOBIUM COMPOUNDS
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
RADIATION DETECTORS
REFRACTORY METAL COMPOUNDS
RESOLUTION
SORPTION
TIMING PROPERTIES
TRANSITION ELEMENT COMPOUNDS