Records |
Author |
Anant, Vikas; Kerman, Andrew J.; Dauler, Eric A.; Yang, Joel K. W.; Rosfjord, Krist.ine M.; Berggren, Karl K. |
Title |
Optical properties of superconducting nanowire single-photon detectors |
Type |
Journal Article |
Year |
2008 |
Publication |
Optics Express |
Abbreviated Journal |
Opt. Express |
Volume |
16 |
Issue |
14 |
Pages |
10750 |
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ISSN |
1094-4087 |
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no |
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RPLAB @ s @ |
Serial |
413 |
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Author |
Thijs de Graauw; Nick Whyborn; Frank Helmich; Pieter Dieleman; Peter Roelfsema; Emmanuel Caux; Tom Phillips; Jürgen Stutzki; Douwe Beintema; Arnold Benz; Nicolas Biver; Adwin Boogert; Francois Boulanger; Sergey Cherednichenko; Odile Coeur-Joly; Claudia Comito; Emmanuel Dartois; Albrecht de Jonge; Gert de Lange; Ian Delorme; Anna DiGiorgio; Luc Dubbeldam; Kevin Edwards; Michael Fich; Rolf Güsten; Fabrice Herpin; Netty Honingh; Robert Huisman; Herman Jacobs; Willem Jellema; Jon Kawamura; Do Kester; Teun Klapwijk; Thomas Klein; Jacob Kooi; Jean-Michel Krieg; Carsten Kramer; Bob Kruizenga; Wouter Laauwen; Bengt Larsson; Christian Leinz; Rene Liseau; Steve Lord; Willem Luinge; Anthony Marston; Harald Merkel; Rafael Moreno; Patrick Morris; Anthony Murphy; Albert Naber; Pere Planesas; Jesus Martin-Pintado; Micheal Olberg; Piotr Orleanski; Volker Ossenkopf; John Pearson; Michel Perault; Sabine Phillip; Mirek Rataj; Laurent Ravera; Paolo Saraceno; Rudolf Schieder; Frank Schmuelling; Ryszard Szczerba; Russell Shipman; David Teyssier; Charlotte Vastel; Huib Visser; Klaas Wildeman; Kees Wafelbakker; John Ward; Roonan Higgins; Henri Aarts; Xander Tielens; Peer Zaal |
Title |
The Herschel-heterodyne instrument for the far-infrared (HIFI): instrument and pre-launch testing |
Type |
Conference Article |
Year |
2008 |
Publication |
Proc. SPIE |
Abbreviated Journal |
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Volume |
7010 |
Issue |
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Pages |
701004 |
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no |
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422 |
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Author |
Li, Mo; Pernice, W. H. P.; Xiong, C.; Baehr-Jones, T.; Hochberg, M.; Tang, H. X. |
Title |
Harnessing optical forces in integrated photonic circuits |
Type |
Journal Article |
Year |
2008 |
Publication |
Nature |
Abbreviated Journal |
Nature |
Volume |
456 |
Issue |
7221 |
Pages |
480-484 |
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0028-0836 |
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no |
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RPLAB @ s @ |
Serial |
425 |
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Author |
Dorenbos, S. N.; Reiger, E. M.; Perinetti, U.; Zwiller, V.; Zijlstra, T.; Klapwijk, T. M. |
Title |
Low noise superconducting single photon detectors on silicon |
Type |
Journal Article |
Year |
2008 |
Publication |
Applied Physics Letters |
Abbreviated Journal |
Appl. Phys. Lett. |
Volume |
93 |
Issue |
13 |
Pages |
131101 |
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0003-6951 |
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no |
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RPLAB @ s @ |
Serial |
436 |
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Author |
Seleznev, V. A.; Tarkhov, M. A.; Voronov, B. M.; Milostnaya, I. I.; Lyakhno, V. Yu; Garbuz, A. S.; Mikhailov, M. Yu; Zhigalina, O. M.; Gol'tsman, G. N. |
Title |
Deposition and characterization of few-nanometers-thick superconducting Mo-Re films |
Type |
Journal Article |
Year |
2008 |
Publication |
Supercond. Sci. Technol. |
Abbreviated Journal |
Supercond. Sci. Technol. |
Volume |
21 |
Issue |
11 |
Pages |
115006 (1 to 6) |
Keywords |
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Abstract |
We report on the fabrication and investigation of few-nanometers-thick superconducting molybdenum-rhenium (Mo-Re) films intended for use in nanowire single-photon superconducting detectors (SSPDs). Mo-Re films were deposited on sapphire substrates by DC magnetron sputtering of an Mo(60)-Re(40) alloy target in an atmosphere of argon. The films 2-10 nm thick had critical temperatures (Tc) from 5.6 to 9.7 K. HRTEM (high-resolution transmission electron microscopy) analysis showed that the films had a homogeneous structure. XPS (x-ray photoelectron spectroscopy) analysis showed the Mo to Re atom ratio to be 0.575/0.425, oxygen concentration to be 10%, and concentration of other elements to be 1%. |
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no |
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RPLAB @ gujma @ |
Serial |
723 |
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Author |
- |
Title |
ГОСТ 2.125-2008 ЕСКД Правила выполнения эскизных конструкторских документов |
Type |
Miscellaneous |
Year |
2008 |
Publication |
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no |
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RPLAB @ kostochkin @ |
Serial |
934 |
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Author |
Meledin D.; Desmaris V.; Ferm S.-E.; Fredrixon M.; Henke D.; Lapkin I.; Nyström O.; Pantaleev M.; Pavolotsky A.; Strandberg M.; Sundin E.; Belitsky V. |
Title |
APEX Band T2: A 1.25 – 1.39 THz Waveguide Balanced HEB Receiver |
Type |
Journal Article |
Year |
2008 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
181-185 |
Keywords |
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Abstract |
A waveguide 1.25–1.39 THz Hot Electron Bolometer (HEB) balanced receiver was successfully developed, characterized and installed at the Atacama Pathfinder EXperiment (APEX) telescope. The receiver employs a quadrature balanced scheme using a waveguide 90-degree 3 dB RF hybrid, HEB mixers and a 180-degree IF hybrid. The HEB mixers are based on ultrathin NbN film deposited on crystalline quartz with a MgO buffer layer. Integrated into the multi-channel APEX facility receiver (SHeFI), the results presented here demonstrate exceptional performance; a receiver noise temperature of 1000 K measured at the telescope at the center of the receiver IF band 2-4 GHz, and at an LO frequency of 1294 GHz. Stability of the receiver is fully in line with the SIS mixer bands of the SHeFI, and gives a spectroscopic Allan time of more than 200 s with a noise bandwidth of 1 MHz. |
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no |
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RPLAB @ atomics90 @ |
Serial |
974 |
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Author |
Kopp, Victor I.; Churikov, Victor M.; Genack, Azriel Z. |
Title |
Chiral-fiber gratings sense the environment |
Type |
Conference Article |
Year |
2008 |
Publication |
Laser Focus World |
Abbreviated Journal |
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Volume |
44 |
Issue |
6 |
Pages |
76-79 |
Keywords |
chiral fiber gratings, chiral gratings, from chiralphotonics |
Abstract |
The article focuses on the use of chiral fiber gratings in sensing. It discusses the production of chiral optical fibers which are created through twisting fibers. It cites experiments concerning the function of chiral-fiber grating produced by twisting optical fibers. The process and results of the experiments are also discussed in the article. |
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no |
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Serial |
850 |
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Author |
Pirandola, Stefano; Mancini, Stefano; Lloyd, Seth; Braunstein, Samuel L. |
Title |
Continuous-variable quantum cryptography using two-way quantum communication |
Type |
Journal Article |
Year |
2008 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
Volume |
4 |
Issue |
9 |
Pages |
726-730 |
Keywords |
fromIPMRAS |
Abstract |
Quantum cryptography has recently been extended to continuous-variable systems, such as the bosonic modes of the electromagnetic field possessing continuous degrees of freedom. In particular, several cryptographic protocols have been proposed and experimentally implemented using bosonic modes with Gaussian statistics. These protocols have shown the possibility of reaching very high secret key rates, even in the presence of strong losses in the quantum communication channel. Despite this robustness to loss, their security can be affected by more general attacks where extra Gaussian noise is introduced by the eavesdropper. Here, we show a `hardware solution' for enhancing the security thresholds of these protocols. This is possible by extending them to two-way quantum communication where subsequent uses of the quantum channel are suitably combined. In the resulting two-way schemes, one of the honest parties assists the secret encoding of the other, with the chance of a non-trivial superadditive enhancement of the security thresholds. These results should enable the extension of quantum cryptography to more complex quantum communications. |
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no |
Call Number |
RPLAB @ gujma @ |
Serial |
798 |
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Author |
de Lange, Gert; Krieg, Jean-Michel; Honingh, Netty; Karpov, Alexandre; Cherednichenko, Sergey |
Title |
Performance of the HIFI flight mixers |
Type |
Conference Article |
Year |
2008 |
Publication |
Proc. 19th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
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Volume |
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Issue |
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Pages |
98-105 |
Keywords |
HEB mixer applications, HEB applications |
Abstract |
We summarize the technology and final results of the superconducting heterodyne SIS and HEB mixers that are developed for the HIFI instrument. Within HIFI 7 frequency bands cover the frequency range from 480 GHz to 1910 GHz. We describe the different device technologies and optical coupling schemes that are used to cover the frequency bands. The efforts of the different mixer teams that participate in HIFI have contributed to an instrument that will have unprecedented sensitivity and frequency coverage. |
Address |
Groningen |
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no |
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Serial |
1074 |
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Author |
Cherednichenko, Sergey; Drakinskiy, Vladimir; Berg, Therese; Khosropanah, Pourya; Kollberg, Erik |
Title |
Hot-electron bolometer terahertz mixers for the Herschel Space Observatory |
Type |
Journal Article |
Year |
2008 |
Publication |
Review of Scientific Instruments |
Abbreviated Journal |
Rev. Sci. Instrum. |
Volume |
79 |
Issue |
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Pages |
034501 |
Keywords |
HEB mixer, HEB detector, HEB direct detector, applications |
Abstract |
We report on low noise terahertz mixers(1.4–1.9THz) developed for the heterodyne spectrometer onboard the Herschel Space Observatory. The mixers employ double slot antenna integrated superconducting hot-electron bolometers (HEBs) made of thin NbN films. The mixer performance was characterized in terms of detection sensitivity across the entire rf band by using a Fourier transform spectrometer (from 0.5to2.5THz, with 30GHz resolution) and also by measuring the mixernoise temperature at a limited number of discrete frequencies. The lowest mixernoise temperature recorded was 750K [double sideband (DSB)] at 1.6THz and 950KDSB at 1.9THz local oscillator (LO) frequencies. Averaged across the intermediate frequency band of 2.4–4.8GHz, the mixernoise temperature was 1100KDSB at 1.6THz and 1450KDSB at 1.9THz LO frequencies. The HEB heterodyne receiver stability has been analyzed and compared to the HEB stability in the direct detection mode. The optimal local oscillator power was determined and found to be in a 200–500nW range. |
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no |
Call Number |
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Serial |
908 |
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Author |
Cherednichenko, S.; Drakinskiy, V. |
Title |
Low noise hot-electron bolometer mixers for terahertz frequencies |
Type |
Journal Article |
Year |
2008 |
Publication |
J. Low Temp. Phys. |
Abbreviated Journal |
J. Low Temp. Phys. |
Volume |
151 |
Issue |
1-2 |
Pages |
575-579 |
Keywords |
HEB, mixer, gain bandwidth, MgB2 |
Abstract |
Hot-electron bolometer (HEB) mixers are used in many low noise heterodyne radio astronomical receivers. Their noise temperature is at the level of 10–15 times the quantum limit. However, their gain bandwidth is a serious limiting factor. Here we review the state of the art of the HEB mixers gain bandwidth for different materials and substrates. We compare the gain bandwidth of HEB mixers made on bulk substrates and thin membranes. Finally, results for MgB2 thin films for broadband HEB mixers are discussed. |
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0022-2291 |
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no |
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RPLAB @ lobanovyury @ |
Serial |
553 |
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Author |
Ryabchun, S. A.; Tretyakov, I. V.; Finkel, M. I.; Maslennikov, S. N.; Kaurova, N. S.; Seleznev, V. A.; Voronov, B. M.; Goltsman, G. N. |
Title |
Fabrication and characterisation of NbN HEB mixers with in situ gold contacts |
Type |
Conference Article |
Year |
2008 |
Publication |
Proc. 19th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 19th Int. Symp. Space Terahertz Technol. |
Volume |
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Issue |
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Pages |
62-67 |
Keywords |
HEB, mixer, NbN, in-situ contacts |
Abstract |
We present our recent results of the fabrication and testing of NbN hot-electron bolometer mixers with in situ gold contacts. An intermediate frequency bandwidth of about 6 GHz has been measured for the mixers made of a 3.5-nm NbN film on a plane Si substrate with in situ gold contacts, compared to 3.5 GHz for devices made of the same film with ex situ gold contacts. The increase in the intermediate frequency bandwidth is attributed to additional diffusion cooling through the improved contacts, which is further supported by the its dependence on the bridge length: intermediate frequency bandwidths of 3.5 GHz and 6 GHz have been measured for devices with lengths of 0.35 μm and 0.16 μm respectively at a local oscillator frequency of 300 GHz near the superconducting transition. At a local oscillator frequency of 2.5 THz the receiver has offered a DSB noise temperature of 950 K. When compared to the previous result of 1300 K obtained at the same local oscillator frequency for devices fabricated with an ex situ route, such a low value of the noise temperature may also be attributed to the improved gold contacts. |
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Groningen, Netherlands |
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412 |
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Tretyakov, I. V.; Ryabchun, S. A.; Maslennikov, S. N.; Finkel, M. I.; Kaurova, N. S.; Seleznev, V. A.; Voronov, B. M.; Gol'tsman, G.N. |
Title |
NbN HEB mixer: fabrication, noise temperature reduction and characterization |
Type |
Conference Article |
Year |
2008 |
Publication |
Proc. Basic problems of superconductivity |
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Volume |
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Issue |
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Pages |
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Keywords |
HEB, mixer, noise temperature, conversion gain bandwidth |
Abstract |
We demonstrate that in the terahertz region superconducting hot-electron mixers offer the lowest noise temperature, opening the possibility of using HTS's in the future to fabricate these devices. Specifically, a noise temperature of 950 K was measured for the receiver operating at 2.5 THz with a NbN HEB mixer, and a gain bandwidth of 6 GHz was measured at 300 GHz near Tc for the same mixer. |
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Moscow-Zvenigorod |
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no |
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591 |
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Smirnov, A. V.; Larionov, P. A.; Finkel, M. I.; Maslennikov, S. N.; Voronov, B. M.; Gol'tsman, G. N. |
Title |
NbZr films for THz phonon-cooled HEB mixers |
Type |
Conference Article |
Year |
2008 |
Publication |
Proc. 19th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 19th Int. Symp. Space Terahertz Technol. |
Volume |
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Pages |
44-47 |
Keywords |
HEB, NbZr, material search |
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Groningen, Netherlands |
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no |
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577 |
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