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Author |
Bell, Matthew; Sergeev, Andrei; Goltsman, Gregory; Bird, Jonathan; Verevkin, Aleksandr |
Title |
Transition-edge sensors based on superconducting nanowires |
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Abstract |
Year |
2006 |
Publication |
Proc. APS March Meeting |
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Proc. APS March Meeting |
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B38.00001 |
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NbN nanowire TES |
Abstract |
We present our experimental study of superconducting NbN nanowire-based sensor. The responsivity of the sensor is strongly affected by the superconducting transition width of the nanostructure, which, in turn, is determined by the phase slip centers (PCSs) dynamics. The fluctuations and noise properties of the sensor are also discussed, as well as the devices' behavior at high magnetic fields. The ultimate performance of the sensor and prospects of the devices will be discussed, as well. |
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1455 |
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Zhang, Qiang; Goebel, Alexander; Wagenknecht, Claudia; Chen, Yu-Ao; Zhao, Bo; Yang, Tao; Mair, Alois; Schmiedmayer, Jörg; Pan, Jian-Wei |
Title |
Experimental quantum teleportation of a two-qubit composite system |
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Journal Article |
Year |
2006 |
Publication |
Nature Physics |
Abbreviated Journal |
Nat. Phys. |
Volume |
2 |
Issue |
10 |
Pages |
678-682 |
Keywords |
fromIPMRAS; quantum teleportation |
Abstract |
Quantum teleportation, a way to transfer the state of a quantum system from one location to another, is central to quantum communication and plays an important role in a number of quantum computation protocols. Previous experimental demonstrations have been implemented with single photonic or ionic qubits. However, teleportation of single qubits is insufficient for a large-scale realization of quantum communication and computation. Here, we present the experimental realization of quantum teleportation of a two-qubit composite system. In the experiment, we develop and exploit a six-photon interferometer to teleport an arbitrary polarization state of two photons. The observed teleportation fidelities for different initial states are all well beyond the state estimation limit of 0.40 for a two-qubit system. Not only does our six-photon interferometer provide an important step towards teleportation of a complex system, it will also enable future experimental investigations on a number of fundamental quantum communication and computation protocols |
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RPLAB @ gujma @ |
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795 |
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Svechnikov, S. I.; Finkel, M. I.; Maslennikov, S. N.; Vachtomin, Y. B.; Smirnov, K. V.; Seleznev, V. A.; Korotetskaya, Y. P.; Kaurova, N. S.; Voronov, B. M.; Gol’tsman, G. N. |
Title |
Superconducting hot electron bolometer mixer for middle IR range |
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Conference Article |
Year |
2006 |
Publication |
Proc. 16th Int. Crimean Microwave and Telecommunication Technology |
Abbreviated Journal |
Proc. 16th Int. Crimean Microwave and Telecommunication Technology |
Volume |
2 |
Issue |
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Pages |
686-687 |
Keywords |
IR NbN HEB mixer, detector, GaAs substrate |
Abstract |
The developed directly lens coupled hot electron bolometer (HEB) mixer was based on 5 nm superconducting NbN deposited on GaAs substrate. The layout of the structure, including 30x20 mcm^2 active area coupled with a 50 Ohm coplanar line, was patterned by photolithography. The responsivity of the mixer was measured in a direct detection mode in the 25-64 THz frequency range. The noise performance of the mixer and the directivity of the receiver were investigated in a heterodyne mode. A 10.6 mum wavelength CW CO2 laser was utilized as a local oscillator. |
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4023440 |
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1297 |
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Vachtomin, Y. B.; Antipov, S. V.; Maslennikov, S. N.; Smirnov, K. V.; Polyakov, S. L.; Zhang, W.; Svechnikov, S. I.; Kaurova, N. S.; Grishina, E. V.; Voronov, B. M.; Gol’tsman, G. N. |
Title |
Quasioptical hot electron bolometer mixers based on thin NBN films for terahertz region |
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Conference Article |
Year |
2006 |
Publication |
Proc. 16th Int. Crimean Microwave and Telecommunication Technology |
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Proc. 16th Int. Crimean Microwave and Telecommunication Technology |
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2 |
Issue |
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Pages |
688-689 |
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NbN HEB mixers |
Abstract |
Presented in this paper are the performances of HEB mixers based on 2-3.5 nm thick NbN films integrated with log-periodic spiral antenna. Double side-band receiver noise temperature values are 1300 K and 3100 K at 2.5 THz and at 3.8 THz, respectively. Mixer gain bandwidth is 5.2 GHz. Local oscillator power is 1-3 muW for mixers with different active area |
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Russian |
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1445 |
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Вахтомин, Ю. Б.; Антипов, С. В.; Масленников, С. Н.; Смирнов, К. В.; Поляков, С. Л.; Чжан, В.; Свечников, С. И.; Каурова, Н. С.; Гришина, Е. В.; Воронов, Б. М.; Гольцман, Г. Н. |
Title |
Квазиоптические смесители терагерцового диапазона на основе эффекта разогрева электронов в тонких пленках NbN |
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Conference Article |
Year |
2006 |
Publication |
Proc. 16th Int. Crimean Microwave and Telecommunication Technology |
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Volume |
2 |
Issue |
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Pages |
688-689 |
Keywords |
NbN HEB mixers |
Abstract |
Представлены результаты измерения рактеристик смесителей на эффекте разогрева электронов в тонких сверхпроводниковых пленках NbN. Смесители были изготовлены на основе пленок NbN толщиной 2-3.5 нм осажденных на кремниевую подложку с буферным подсло- ем MgO. Смесительный элемент согласовывался с планар- ной логопериодической спиральной антенной. Лучшее зна- чение шумовой температуры приемника на основе NbN смесителя составило 1300 К и 3100 К на частотах гетеро- дина 2.5 TГц и 3.8 ТГц, соответственно. Максимальное зна- чение полосы преобразования, измеренной на частоте 900 |Ц, достигло значения 5.2 ГГц для смесителя изготовлен- ного из NbN пленки толщиной 2 нм. Оптимальная мощность Представлены результаты измерения ха- гетеродинного источника составила 1-3 мкВт для смесите- лей с различным объемом смесительного элемента. |
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Duplicated as 1445 |
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1446 |
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Smirnov, K.; Korneev, A.; Minaeva, O.; Divochij, A.; Rubtsova, I.; Antipov, A.; Ryabchun, S.; Okunev, O.; Milostnaya, I.; Chulkova, G.; Voronov, B.; Kaurova, N.; Seleznev, V.; Korotetskaya, Y.; Gol’tsman, G. |
Title |
Superconducting single-photon detector for near- and middle IR wavelength range |
Type |
Conference Article |
Year |
2006 |
Publication |
Proc. 16th Int. Crimean Microwave and Telecommunication Technology |
Abbreviated Journal |
Proc. 16th Int. Crimean Microwave and Telecommunication Technology |
Volume |
2 |
Issue |
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Pages |
684-685 |
Keywords |
NbN SSPD, SNSPD |
Abstract |
Presented in this paper are the results of research of NbN-film superconducting single-photon detector. At 2 K temperature, quantum efficiency in the visible light (0.56 mum) reaches 30-40 %. With the wavelength increase quantum efficiency decreases and comes to 20% at 1.55 mum and 0.02% at 5.6 mum. Minimum dark counts rate is 2times10-4s-1. The jitter of detector is 35 ps. The detector was successfully implemented for integrated circuits non-invasive optical testing. It is also perspective for quantum cryptography systems |
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1447 |
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Author |
Stevens, M.; Hadfeld, R.; Schwall, R.; Nam, S.W.; and Mirin, R. |
Title |
Quantum dot single photon sources studied with superconducting single photon detectors |
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Journal Article |
Year |
2006 |
Publication |
IEEE J. Sel. Topics Quantum Electron. |
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Volume |
12 |
Issue |
6 |
Pages |
1255-1267 |
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SSPD, jitter, QD, QW |
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RPLAB @ akorneev @ |
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612 |
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Rosfjord, Kristine M.; Yang, Joel K. W.; Dauler, Eric A.; Kerman, Andrew J.; Vikas Anant; Voronov, Boris M.; Gol'tsman, Gregory N.; Berggren, Karl K. |
Title |
Nanowire Single-photon detector with an integrated optical cavity and anti-reflection coating |
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Journal Article |
Year |
2006 |
Publication |
Opt. Express |
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Opt. Express |
Volume |
14 |
Issue |
2 |
Pages |
527-534 |
Keywords |
SSPD, SNSPD, cavity |
Abstract |
We have fabricated and tested superconducting single-photon detectors and demonstrated detection efficiencies of 57% at 1550-nm wavelength and 67% at 1064 nm. In addition to the peak detection efficiency, a median detection efficiency of 47.7% was measured over 132 devices at 1550 nm. These measurements were made at 1.8K, with each device biased to 97.5% of its critical current. The high detection efficiencies resulted from the addition of an optical cavity and anti-reflection coating to a nanowire photodetector, creating an integrated nanoelectrophotonic device with enhanced performance relative to the original device. Here, the testing apparatus and the fabrication process are presented. The detection efficiency of devices before and after the addition of optical elements is also reported. |
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1094-4087 |
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PMID:19503367 |
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388 |
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Semenov, A. D.; Il'in, K.; Siegel, M.; Smirnov, A.; Pavlov, S.; Richter, H.; Hübers, H.-W. |
Title |
Evidence of non-bolometric mixing in the bandwidth of a hot-electron bolometer |
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Journal Article |
Year |
2006 |
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Superconductor Science and Technology |
Abbreviated Journal |
Supercond. Sci. Technol. |
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19 |
Issue |
10 |
Pages |
1051-1056 |
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HEB |
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0953-2048 |
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536 |
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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 |
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Journal Article |
Year |
2006 |
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Supercond. Sci. Technol. |
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Supercond. Sci. Technol. |
Volume |
19 |
Issue |
4 |
Pages |
L (9 to 12) |
Keywords |
NbN HEB mixers |
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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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0953-2048 |
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1456 |
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Gordon, N. T.; Lees, D. J.; Bowen, G.; Phillips, T. S.; Haigh, M.; Jones, C. L.; Maxey, C. D.; Hipwood, L.; Catchpole, R. A. |
Title |
HgCdTe detectors operating above 200 K |
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Journal Article |
Year |
2006 |
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J. Electron. Mater. |
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35 |
Issue |
6 |
Pages |
1140-1144 |
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HgCdTe detector |
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0361-5235 |
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467 |
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Koshelets, V. P.; Ermakov, A. B.; Filippenko, L. V.; Koryukin, O. V.; Khudchenko, A. V.; Sobolev, A. S.; Torgashin, M. Yu.; Yagoubov, P. A.; Hoogeveen, R. W. M.; Vreeling, W. J.; Wild, W.; Pylypenko, O. M. |
Title |
Superconducting submm integrated receiver for TELIS |
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Conference Article |
Year |
2006 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
Volume |
43 |
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Pages |
1377-1380 |
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SIR |
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1742-6588 |
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514 |
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Milostnaya, I.; Korneev, A.; Rubtsova, I.; Seleznev, V.; Minaeva, O.; Chulkova, G.; Okunev, O.; Voronov, B.; Smirnov, K.; Gol'tsman, G.; Slysz, W.; Wegrzecki, M.; Guziewicz, M.; Bar, J.; Gorska, M.; Pearlman, A.; Kitaygorsky, J.; Cross, A.; Sobolewski, R. |
Title |
Superconducting single-photon detectors designed for operation at 1.55-µm telecommunication wavelength |
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Conference Article |
Year |
2006 |
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J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
Volume |
43 |
Issue |
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1334-1337 |
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NbN SSPD, SNSPD |
Abstract |
We report on our progress in development of superconducting single-photon detectors (SSPDs), specifically designed for secure high-speed quantum communications. The SSPDs consist of NbN-based meander nanostructures and operate at liquid helium temperatures. In general, our devices are capable of GHz-rate photon counting in a spectral range from visible light to mid-infrared. The device jitter is 18 ps and dark counts can reach negligibly small levels. The quantum efficiency (QE) of our best SSPDs for visible-light photons approaches a saturation level of ~30-40%, which is limited by the NbN film absorption. For the infrared range (1.55µm), QE is ~6% at 4.2 K, but it can be significantly improved by reduction of the operation temperature to the 2-K level, when QE reaches ~20% for 1.55-µm photons. In order to further enhance the SSPD efficiency at the wavelength of 1.55 µm, we have integrated our detectors with optical cavities, aiming to increase the effective interaction of the photon with the superconducting meander and, therefore, increase the QE. A successful effort was made to fabricate an advanced SSPD structure with an optical microcavity optimized for absorption of 1.55 µm photons. The design consisted of a quarter-wave dielectric layer, combined with a metallic mirror. Early tests performed on relatively low-QE devices integrated with microcavities, showed that the QE value at the resonator maximum (1.55-µm wavelength) was of the factor 3-to-4 higher than that for a nonresonant SSPD. Independently, we have successfully coupled our SSPDs to single-mode optical fibers. The completed receivers, inserted into a liquid-helium transport dewar, reached ~1% system QE for 1.55 µm photons. The SSPD receivers that are fiber-coupled and, simultaneously, integrated with resonators are expected to be the ultimate photon counters for optical quantum communications. |
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1742-6588 |
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1450 |
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McDonald, P.C.; Jaramillo, E.; Baudouy, B. |
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Thermal design of the CFRP support struts for the spatial framework of the Herschel Space Observatory |
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Journal Article |
Year |
2006 |
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Cryogenics |
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Cryogenics |
Volume |
46 |
Issue |
4 |
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298-304 |
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0011-2275 |
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RPLAB @ s @ |
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442 |
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Brown, E. R.; Lee, A. W. M.; Navi, B. S.; Bjarnason, J. E. |
Title |
Characterization of a planar self-complementary square-spiral antenna in the THz region |
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Journal Article |
Year |
2006 |
Publication |
Microwave and Optical Technology Letters |
Abbreviated Journal |
Microwave Opt Technol Lett |
Volume |
48 |
Issue |
3 |
Pages |
524-529 |
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optical antennas; square spiral antenna; self complementary THz; photomixing; lens; method of moments; geometric optics; physical optics |
Abstract |
This paper describes a compact, self-complementary square-spiral antenna on a GaAs substrate with a broadside high-directivity (~9 dB) frequency-independent pattern when coupled through a silicon hyperhemisphere. The driving-point resistance undulates between ~00 and 300Ω from 200 GHz to 1 THz—much higher than the 72Ω value from Booker's modified formula, but quite beneficial for coupling to high-impedance broadband devices |
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RPLAB @ gujma @ |
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736 |
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