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Semenov, A.; Goltsman, G.; Korneev, A. |
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Title |
Quantum detection by current carrying superconducting film |
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Journal Article |
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2001 |
Publication |
Phys. C: Supercond. |
Abbreviated Journal |
Phys. C: Supercond. |
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351 |
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4 |
Pages |
349-356 |
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Keywords |
quantum detection, phase slip centers, quasiparticle diffusion |
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Abstract |
We describe a novel quantum detection mechanism in the superconducting film carrying supercurrent. The mechanism incorporates growing normal domain and breaking of superconductivity by the bias current. A single photon absorbed in the film creates transient normal spot that causes redistribution of the current and, consequently, increase of the current density in superconducting areas. When the current density exceeds the critical value, the film switches into resistive state and generates the voltage pulse. Analysis shows that a submicron-wide film of conventional low temperature superconductor operated in liquid helium may detect single far-infrared photon. The amplitude and duration of the voltage pulse are in the millivolt and picosecond range, respectively. The quantitative model is presented that allows simulation of the detector utilizing this detection mechanism. |
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0921-4534 |
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507 |
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Murk, A.; Kämpfer, N.; Wylde, R.; Inatani, J.; Manabe, T.; Seta, M. |
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Title |
Characterization of various quasi-optical components for the submillimeter limb-sounder SMILES |
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Conference Article |
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2001 |
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Proc. 12th Int. Symp. Space Terahertz Technol. |
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426-435 |
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limb-sounder |
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530 |
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Kasparek, W; Fernandez, A.; Hollmann, F; Wacker, R. |
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Title |
Measurements of ohmic losses of metallic reflectors at 140 GHz using a 3-mirror resonator technique |
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Journal Article |
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2001 |
Publication |
Int. J. Infrared and Millimeter Waves |
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22 |
Issue |
11 |
Pages |
1695-1707 |
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mirror, reflection index, emissivity, Fabry-Perot interferometer, subterahertz, subTHz |
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The reflectivity of metallic mirrors in the millimeter wave region does not only depend on the material, but also on the structure and roughness of the surface. We have performed measurements of the reflectivity of various plane and grooved metallic and graphite samples at 140 GHz. The technique is based on the comparison of the quality factor of a 2-mirror reference resonator with the quality factor of a 3-mirror resonator which has identical dimensions and includes the mirror to be tested. After a brief presentation of the theory, the set-up is described and the reflection loss for various aluminium and copper mirrors as well as vacuum compatible materials for applications in thermonuclear fusion experiments are presented and discussed. |
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581 |
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Verevkin, A.; Williams, C.; Gol’tsman, G. N.; Sobolewski, R.; Gilbert, G. |
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Single-photon superconducting detectors for practical high-speed quantum cryptography |
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Miscellaneous |
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2001 |
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OFCC/ICQI |
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OFCC/ICQI |
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Pa3 |
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NbN SSPD, SNSPD, QKD, quantum cryptography |
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We have developed an ultrafast superconducting single-photon detector with negligible dark counting rate. The detector is based on an ultrathin, submicron-wide NbN meander-type stripe and can detect individual photons in the visible to near-infrared wavelength range at a rate of at least 10 Gb/s. The above counting rate allows us to implement the NbN device to unconditionally secret quantum key distRochester, New Yorkribution in a practical, high-speed system using real-time Vernam enciphering. |
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Rochester, New York |
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Optical Society of America |
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Optical Fiber Communication Conference and International Conference on Quantum Information |
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-- from poster session. |
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1544 |
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Author |
Boreman, Glenn D. |
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Title |
A Users guide to IR detectors |
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Conference Article |
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2001 |
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Proc. SPIE |
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Proc. SPIE |
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4420 |
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79-90 |
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Keywords |
optical antennas |
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This paper will guide the first-time user toward proper selection and use of IR detectors for applications in industrial inspection, process control, and laser measurements. |
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RPLAB @ gujma @ |
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735 |
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