| Records |
| Author |
Zubkova, E.; An, P.; Kovalyuk, V.; Korneev, A.; Goltsman, G. |
| Title |
Integrated Bragg waveguides as an efficient optical notch filter on silicon nitride platform |
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Conference Article |
| Year |
2017 |
Publication |
Proc. SPBOPEN |
Abbreviated Journal |
Proc. SPBOPEN |
| Volume |
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Pages |
449-450 |
| Keywords |
Bragg waveguides |
| Abstract |
We modeled and fabricated integrated optical Bragg waveguides on a silicon nitride (Si3N4) platform. Transmission spectra of the integrated notch filter has been measured and attenuation at the desired wavelength of 1550 nm down to -43 dB was observed. |
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St. Petersburg, Russia |
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Duplicated as 1141 |
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1257 |
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Semenov, A.; Richter, H.; Hübers, H.-W.; Smirnov, K.; Voronov, B.; Gol'tsman, G. |
| Title |
Development of terahertz superconducting hot-electron bolometer mixers |
Type |
Conference Article |
| Year |
2003 |
Publication |
Proc. 6th European Conf. Appl. Supercond. |
Abbreviated Journal |
Proc. 6th European Conf. Appl. Supercond. |
| Volume |
181 |
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Pages |
2960-2965 |
| Keywords |
NbN HEB mixers |
| Abstract |
We present recent results of the development of phonon cooled hot-electron bolometric (HEB) mixers for airborne and balloon borne terahertz heterodyne receivers. Three iomportant issues have been addresses: the quality of NbN films the HEB mixers were made from, the spectral properties of the HEB mixers and the local oscillator power required for optical operation. Studies with an atomic force microscope indicate, that the performance of the HEB mixer might have been effected by the microstructure of the NbN film. Antenna gain and noise temperature were investigated at terahertz frequencies for a HEB embedded in either log-spiral or twin-slot feed antenna. Comparison suggests that at frequencies above 3 THz the spiral feed provides better overall performance. At 1.6 THz, a power of 2.5 µW was required from the local oscillator for optimal operation of the HEB mixer. |
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Sorrento, Italy |
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0750309814, 978-0750309813 |
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no |
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1505 |
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Verevkin, A.; Williams, C.; Gol’tsman, G. N.; Sobolewski, R.; Gilbert, G. |
| Title |
Single-photon superconducting detectors for practical high-speed quantum cryptography |
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Miscellaneous |
| Year |
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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Gayduchenko, I. A.; Fedorov, G. E.; Moskotin, M. V.; Yagodkin, D. I.; Seliverstov, S. V.; Goltsman, G. N.; Yu Kuntsevich, A.; Rybin, M. G.; Obraztsova, E. D.; Leiman, V. G.; Shur, M. S.; Otsuji, T.; Ryzhii, V. I. |
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Manifestation of plasmonic response in the detection of sub-terahertz radiation by graphene-based devices |
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Journal Article |
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2018 |
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Nanotechnol. |
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Nanotechnol. |
| Volume |
29 |
Issue |
24 |
Pages |
245204 (1 to 8) |
| Keywords |
single layer graphene, graphene nanoribbons |
| Abstract |
We report on the sub-terahertz (THz) (129-450 GHz) photoresponse of devices based on single layer graphene and graphene nanoribbons with asymmetric source and drain (vanadium and gold) contacts. Vanadium forms a barrier at the graphene interface, while gold forms an Ohmic contact. We find that at low temperatures (77 K) the detector responsivity rises with the increasing frequency of the incident sub-THz radiation. We interpret this result as a manifestation of a plasmonic effect in the devices with the relatively long plasmonic wavelengths. Graphene nanoribbon devices display a similar pattern, albeit with a lower responsivity. |
| Address |
Physics Department, Moscow State University of Education, Moscow 119991, Russia. National Research Center 'Kurchatov Institute', 123182, Moscow, Russia |
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0957-4484 |
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PMID:29553479 |
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1308 |
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Tong, C.-Y. E.; Meledin, D.; Loudkov, D.; Blundell, R.; Erickson, N.; Kawamura, J.; Mehdi, I.; Gol’tsman, G. |
| Title |
A 1.5 THz Hot-Electron Bolometer mixer operated by a planar diode based local oscillator |
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Conference Article |
| Year |
2003 |
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IEEE MTT-S Int. Microwave Symp. Digest |
Abbreviated Journal |
IEEE MTT-S Int. Microwave Symp. Digest |
| Volume |
2 |
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Pages |
751-754 |
| Keywords |
waveguide NbN HEB mixers |
| Abstract |
We have developed a 1.5 THz superconducting NbN Hot-Electron Bolometer mixer. It is operated by an all-solid-state Local Oscillator comprising of a cascade of 4 planar doublers following an MMIC based W-band power amplifier. The threshold available pump power is estimated to be 1 /spl mu/W. |
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Philadelphia, PA, USA |
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1516 |
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