Radiant energy – Invisible radiant energy responsive electric signalling – Superconducting type
Reexamination Certificate
2006-05-23
2006-05-23
Gagliardi, Albert (Department: 2878)
Radiant energy
Invisible radiant energy responsive electric signalling
Superconducting type
C250S338100
Reexamination Certificate
active
07049593
ABSTRACT:
A single-photon detector includes a superconductor strip biased near its critical current. The superconductor strip provides a discernible output signal upon absorption of a single incident photon. In one example, the superconductor is a strip of NbN (niobium nitride). In another example, the superconductor strip meanders to increase its probability of receiving a photon from a light source. The single-photon detector is suitable for a variety of applications including free-space and satellite communications, quantum communications, quantum cryptography, weak luminescence, and semiconductor device testing.
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Gol'tsman Grigory N.
Kasapi Steven A.
Okunev Oleg V.
Semenov Alexey D.
Sobolewski Roman
Credence Systems Corporation
Dorsey & Whitney LLP
Gagliardi Albert
University of Rochester
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