| Records |
| Author |
Rodriguez-Morales, F.; Zannoni, R.; Nicholson, J.; Fischetti, M.; Yngvesson, K. S.; Appenzeller, J. |
| Title |
Direct and heterodyne detection of microwaves in a metallic single wall carbon nanotube |
Type |
Journal Article |
| Year |
2006 |
Publication  |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
| Volume |
89 |
Issue |
8 |
Pages |
083502 |
| Keywords |
carbon nanotube, GHz heterodyne detector, direct detector |
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0003-6951 |
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565 |
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Siemsen, K. J.; Bernard, J. E.; Madej, A. A.; Marmet, L. |
| Title |
Absolute frequency measurement of a CO2/OsO4 stabilized laser at 28.8 THz |
Type |
Journal Article |
| Year |
2001 |
Publication |
Applied Physics B: Lasers and Optics |
Abbreviated Journal |
Appl. Phys. B: Lasers and Optics |
| Volume |
72 |
Issue |
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Pages |
567-573 |
| Keywords |
HgCdTe detector |
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462 |
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Gershenson, M. E.; Gong, D.; Sato, T.; Karasik, B. S.; Sergeev, A. V. |
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Millisecond electron-phonon relaxation in ultrathin disordered metal films at millikelvin temperatures |
Type |
Journal Article |
| Year |
2001 |
Publication |
Appl. Phys. Lett. |
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| Volume |
79 |
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Pages |
2049-2051 |
| Keywords |
HEB detector, FIR, far infrared |
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RPLAB @ s @ heb_eph_interaction_Gershenzon |
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315 |
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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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856 |
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Semenov, A. D.; Goghidze, I. G.; Gol’tsman, G. N.; Sergeev, A. V.; Gershenzon, E. M. |
| Title |
Evidence for the spectral dependence of nonequilibrium picosecond photoresponse of YBaCuO thin films |
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Journal Article |
| Year |
1993 |
Publication |
Appl. Phys. Lett. |
Abbreviated Journal |
Appl. Phys. Lett. |
| Volume |
63 |
Issue |
5 |
Pages |
681-683 |
| Keywords |
YBCO HTS detectors, nonequilibrium |
| Abstract |
The transient voltage photoresponse of current biased YBaCuO thin films to 20 ps laser pulses of 0.63 and 1.54 μm wavelengths is measured for temperatures around the superconducting transition region. The fast picosecond decay of the response is followed by a slow nanosecond relaxation which is associated with the bolometric effect. The magnitude of the fast component of the response varies in proportion to the square root of wavelength that plausibly reflects multiplication processes of photoexcited electrons via electron–electron scattering and interaction with high energy phonons. |
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0003-6951 |
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1655 |
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