| Records |
| Author |
Wright, E. L.; Reese, E. D. |
| Title |
Detection of the cosmic infrared background at 2.2 and 3.5 microns using DIRBE observations |
Type |
Journal Article |
| Year |
2000 |
Publication |
Astrophys. J. |
Abbreviated Journal |
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| Volume |
545 |
Issue |
1 |
Pages |
43-55 |
| Keywords |
IR applications |
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0004-637X |
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Call Number  |
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Serial |
486 |
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| Author |
Saslaw, William C. |
| Title |
The distribution of the galaxies. Gravitational clustering in cosmology |
Type |
Book Whole |
| Year |
2000 |
Publication |
Press syndicate of the University of Cambridge |
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| Keywords |
astronomy |
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no |
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Serial |
495 |
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| Author |
Nagatsuma, T.; Hirata, A.; Royter, Y.; Shinagawa, M.; Furuta, T.; Ishibashi, T.; Ito, H. |
| Title |
A 120-GHz integrated photonic transmitter |
Type |
Conference Article |
| Year |
2000 |
Publication |
Proc. International topical meeting on microwave photonics (MWP 2000) |
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Issue |
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Pages |
225 - 228 |
| Keywords |
THz, teraherts communications, terahertz communication channel, photodiode, transmitter |
| Abstract |
A photonics-based 120-GHz transmitter has been developed. A photodiode, a planar antenna and a silicon lens were integrated to form a compact millimeter-wave (MMW) emitter. The MMW signal emitted from the transmitter has been detected with a waveguide-mounted Schottky diode. The received power exceeded 100 μW, which is the highest value ever reported for photonic MMW transmitter at frequencies of >100 GHz |
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no |
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595 |
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Il'in, K. S.; Lindgren, M.; Currie, M. A.; Semenov, D.; Gol'tsman, G. N.; Sobolewski, Roman; Cherednichenko, S. I.; Gershenzon, E. M. |
| Title |
Picosecond hot-electron energy relaxation in NbN superconducting photodetectors |
Type |
Journal Article |
| Year |
2000 |
Publication |
Appl. Phys. Lett. |
Abbreviated Journal |
Appl. Phys. Lett. |
| Volume |
76 |
Issue |
19 |
Pages |
2752-2754 |
| Keywords |
NbN HEB detectors, two-temperature model, IF bandwidth |
| Abstract |
We report time-resolved characterization of superconducting NbN hot-electron photodetectors using an electro-optic sampling method. Our samples were patterned into micron-size microbridges from 3.5-nm-thick NbN films deposited on sapphire substrates. The devices were illuminated with 100 fs optical pulses, and the photoresponse was measured in the ambient temperature range between 2.15 and 10.6 K (superconducting temperature transition TC). The experimental data agreed very well with the nonequilibrium hot-electron, two-temperature model. The quasiparticle thermalization time was ambient temperature independent and was measured to be 6.5 ps. The inelastic electron–phonon scattering time Ï„e–ph tended to decrease with the temperature increase, although its change remained within the experimental error, while the phonon escape time Ï„es decreased almost by a factor of two when the sample was put in direct contact with superfluid helium. Specifically, Ï„e–ph and Ï„es, fitted by the two-temperature model, were equal to 11.6 and 21 ps at 2.15 K, and 10(±2) and 38 ps at 10.5 K, respectively. The obtained value of Ï„e–ph shows that the maximum intermediate frequency bandwidth of NbN hot-electron phonon-cooled mixers operating at TC can reach 16(+4/–3) GHz if one eliminates the bolometric phonon-heating effect. |
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0003-6951 |
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no |
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856 |
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ГОСТ 2.711-82. ЕСКД. Схема деления изделия на составные части |
Type |
Book Whole |
| Year |
2000 |
Publication |
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| Keywords |
gost, detproj |
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no |
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859 |
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