| Records |
Author  |
Yang, Z. Q.; Hajenius, M.; Baselmans, J. J. A.; Gao, J. R.; Voronov, B.; Gol’tsman, G. N. |
| Title |
Reduced noise in NbN hot-electron bolometer mixers by annealing |
Type |
Journal Article |
| Year |
2006 |
Publication |
Supercond. Sci. Technol. |
Abbreviated Journal |
Supercond. Sci. Technol. |
| Volume |
19 |
Issue |
4 |
Pages |
L (9 to 12) |
| Keywords |
NbN HEB mixers |
| Abstract |
We find that the sensitivity of heterodyne receivers based on superconducting hot-electron bolometers (HEBs) increases by 25–30% after annealing at 85 °C in vacuum. The devices studied are twin-slot antenna coupled mixers with a small NbN bridge of 1 × 0.15 µm2. We show that annealing changes the device properties as reflected in sharper resistive transitions of the complete device, apparently reducing the device-related noise. The lowest receiver noise temperature of 700 K is measured at a local oscillator frequency of 1.63 THz and a bath temperature of 4.3 K. |
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| ISSN |
0953-2048 |
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no |
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1456 |
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| Author |
Yang, J. K. W.; Dauler, E.; Ferri, A.; Pearlman, A.; Verevkin, A.; Gol’tsman, G.; Voronov, B.; Sobolewski, R.; Keicher, W. E.; Berggren, K. K. |
| Title |
Fabrication development for nanowire GHz-counting-rate single-photon detectors |
Type |
Journal Article |
| Year |
2005 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
| Volume |
15 |
Issue |
2 |
Pages |
626-630 |
| Keywords |
NbN SSPD, SNSPD |
| Abstract |
We have developed a fabrication process for GHz-counting-rate, single-photon, high-detection-efficiency, NbN, nanowire detectors. We have demonstrated two processes for the device patterning, one based on the standard polymethylmethacrylate (PMMA) organic positive-tone electron-beam resist, and the other based on the newer hydrogen silsesquioxane (HSQ) negative-tone spin-on-glass resist. The HSQ-based process is simple and robust, providing high resolution and the prospect of high fill-factors. Initial testing results show superconductivity in the films, and suggest that the devices exhibit photosensitivity. |
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| ISSN |
1558-2515 |
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no |
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Serial |
1466 |
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| Author |
Yagoubov, P.; Kroug, M.; Merkel, H.; Kollberg, E.; Schubert, J.; Hubers, H.-W.; Schwaab, G.; Gol’tsman, G.; Gershenzon, E. |
| Title |
Performance of NbN phonon-cooled hot-electron bolometric mixer at Terahertz frequencies |
Type |
Conference Article |
| Year |
1998 |
Publication |
Proc. 6-th Int. Conf. Terahertz Electron. |
Abbreviated Journal |
Proc. 6-th Int. Conf. Terahertz Electron. |
| Volume |
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Issue |
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Pages |
149-152 |
| Keywords |
NbN HEB mixers |
| Abstract |
The performance of a NbN based phonon-cooled Hot Electron Bolometric (HEB) quasioptical mixer is investigated in the 0.65-3.12 THz frequency range. The device is made from a 3 nm thick NbN film on high resistivity Si and integrated with a planar spiral antenna on the same substrate. The in-plane dimensions of the bolometer strip are 0.2/spl times/2 /spl mu/m. The results of the DSB noire temperature are: 1300 K at 650 GHz, 4700 K at 2.5 TBz and 10000 K at 3.12 THz. The RF bandwidth of the receiver is at least 2.5 THz. The amount of LO power absorbed in the bolometer is about 100 nW. The mixer is linear to within 1 dB compression up to the signal level 10 dB below that of the LO. The intrinsic single sideband conversion gain is measured to be -9 dB, the total conversion gain -14 dB. |
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IEEE Sixth International Conference on Terahertz Electronics Proceedings. THZ 98. (Cat. No.98EX171) |
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1582 |
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| Author |
Yagoubov, P.; Hübers, H.-W.; Gol’tsman, G.; Semenov, A.; Gao, J.; Hoogeveen, R.; de Graauw, T.; Birk, M.; Selig, A.; de Korte, P. |
| Title |
Hot-electron bolometer mixers – technology for far-infrared heterodyne instruments in future atmospheric chemistry missions |
Type |
Conference Article |
| Year |
2001 |
Publication |
Proc. 3rd Int. Symp. Submillimeter Wave Earth Observation From Space |
Abbreviated Journal |
Proc. 3rd Int. Symp. Submillimeter Wave Earth Observation From Space |
| Volume |
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Issue |
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Pages |
57-69 |
| Keywords |
HEB mixers |
| Abstract |
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| Address |
Delmenhorst |
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Thesis |
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| Publisher |
Logos-Verlag |
Place of Publication |
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Editor |
Buehler, S.; Berlin |
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ISBN |
3-89722-700-2 |
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Conference |
International Symposium on Submillimeter Wave Earth Observation from Space, ISSMWEOS01 |
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Serial |
1549 |
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| Author |
Xu, Y.; Zheng, X.; Williams, C.; Verevkin, A.; Sobolewski, R.; Chulkova, G.; Lipatov, A.; Okunev, O.; Smirnov, K.; Gol’tsman, G. N. |
| Title |
Ultrafast superconducting hot-electron single-photon detector |
Type |
Conference Article |
| Year |
2001 |
Publication |
CLEO |
Abbreviated Journal |
CLEO |
| Volume |
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Issue |
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Pages |
345 |
| Keywords |
NbN SSPD, SNSPD |
| Abstract |
Summary form only given. The current most-pressing need is to develop a practical, GHz-range counting single-photon detector, operational at either 1.3-/spl mu/m or 1.55-/spl mu/m radiation wavelength, for novel quantum communication and quantum cryptography systems. The presented solution of the problem is to use an ultrafast hot-electron photodetector, based on superconducting thin-film microstructures. This type of device is very promising, due to the macroscopic quantum nature of superconductors. Very fast response time and the small, (meV range) value of the superconducting energy gap characterize the superconductor, leading to the efficient avalanche process even for infrared photons. |
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Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Technical Digest (IEEE Cat. No.01CH37170) |
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no |
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Serial |
1545 |
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| Author |
Verevkin, A.; Xu, Y.; Zheng, X.; Williams, C.; Sobolewski, Roman; Okunev, O.; Smirnov, K.; Chulkova, G.; Korneev, A.; Lipatov, A.; Gol’tsman, G. N. |
| Title |
Superconducting NbN-based ultrafast hot-electron single-photon detector for infrared range |
Type |
Conference Article |
| Year |
2001 |
Publication |
Proc. 12th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 12th Int. Symp. Space Terahertz Technol. |
| Volume |
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Issue |
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Pages |
462-468 |
| Keywords |
NbN SSPD, SNSPD |
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no |
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Serial |
1539 |
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| Author |
Verevkin, A.; Williams, C.; Gol’tsman, G. N.; Sobolewski, R.; Gilbert, G. |
| Title |
Single-photon superconducting detectors for practical high-speed quantum cryptography |
Type |
Miscellaneous |
| Year |
2001 |
Publication |
OFCC/ICQI |
Abbreviated Journal |
OFCC/ICQI |
| Volume |
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Issue |
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Pages |
Pa3 |
| Keywords |
NbN SSPD, SNSPD, QKD, quantum cryptography |
| Abstract |
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. |
| Address |
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 |
| Notes |
-- from poster session. |
Approved |
no |
| Call Number |
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Serial |
1544 |
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| Author |
Verevkin, A.; Slysz, W.; Pearlman, A.; Zhang, J.; Sobolewski, R.; Okunev, O.; Korneev, A.; Kouminov, P.; Smirnov, K.; Chulkova, G.; Gol’tsman, G. N.; Currie, M. |
| Title |
Real-time GHz-rate counting of infrared photons using nanostructured NbN superconducting detectors |
Type |
Conference Article |
| Year |
2003 |
Publication |
CLEO/QELS |
Abbreviated Journal |
CLEO/QELS |
| Volume |
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Issue |
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Pages |
CThM8 |
| Keywords |
NbN SSPD; SNSPD; Infrared; Quantum detectors; Detectors; Photon counting; Quantum communications; Quantum cryptography; Single photon detectors; Superconductors |
| Abstract |
We demonstrate that our ultrathin, nanometer-width NbN superconducting single-photon detectors are capable of above 1-GHz-frequency, real-time counting of near-infrared photons. The measured system jitter of the detector is below 15 ps. |
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Optical Society of America |
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Conference |
Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference |
| Notes |
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Approved |
no |
| Call Number |
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Serial |
1517 |
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| Author |
Verevkin, A. A.; Zhang, J.; Slysz, W.; Sobolewski, R.; Lipatov, A. P.; Okunev, O.; Chulkova, G.; Korneev, A.; Gol’tsman, G. N. |
| Title |
Superconducting single-photon detectors for GHz-rate free-space quantum communications |
Type |
Conference Article |
| Year |
2002 |
Publication |
Proc. SPIE |
Abbreviated Journal |
Proc. SPIE |
| Volume |
4821 |
Issue |
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Pages |
447-454 |
| Keywords |
NbN SSPD, SNSPD, single-photon detector, thin-film superconductivity, quantum cryptography, ultrafast communications |
| Abstract |
We report our studies on the performance of new NbN ultrathin-film superconducting single-photon detectors (SSPDs). Our SSPDs exhibit experimentally measured quantum efficiencies from 5% at wavelength λ = 1550 nm up to 10% at λ = 405 nm, with exponential, activation-energy-type spectral sensitivity dependence in the 0.4-μm – 3-μm wavelength range. Using a variable optical delay setup, we have shown that our NbN SSPDs can resolve optical photons with a counting rate up to 10 GHz, presently limited by the read-out electronics. The measured device jitter was below 35 ps under optimum biasing conditions. The extremely high photon counting rate, together with relatively high (especially for λ > 1 μm) quantum efficiency, low jitter, and very low dark counts, make NbN SSPDs very promising for free-space communications and quantum cryptography. |
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SPIE |
Place of Publication |
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Editor |
Ricklin, J.C.; Voelz, D.G. |
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Conference |
Free-Space Laser Communication and Laser Imaging II |
| Notes |
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Approved |
no |
| Call Number |
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Serial |
1523 |
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| Author |
Verevkin, A. A.; Ptitsina, N. G.; Smirnov, K. V.; Voronov, B. M.; Gol’tsman, G. N.; Gershenson, E. M.; Yngvesson, K. S. |
| Title |
Multiple Andreev reflection in hybrid AlGaAs/GaAs structures with superconducting NbN contacts |
Type |
Journal Article |
| Year |
1999 |
Publication |
Semicond. |
Abbreviated Journal |
Semicond. |
| Volume |
33 |
Issue |
5 |
Pages |
551-554 |
| Keywords |
2DEG, AlGaAs/GaAs heterostructures |
| Abstract |
The conductivity of hybrid microstructures with superconducting contacts made of niobium nitride to a semiconductor with a two-dimensional electron gas in a AlGaAs/GaAs heterostructure has been investigated. Distinctive features of the behavior of the conductivity indicate the presence of multiple Andreev reflection at scattering centers in the normal region near the superconductor-semiconductor boundary. |
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Edition |
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| ISSN |
1063-7826 |
ISBN |
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no |
| Call Number |
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Serial |
1571 |
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