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Author |
Gershenzon, E.; Goltsman, G.; Orlov, L.; Ptitsina, N. |
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Title |
Population of excited-states of small admixtures in germanium |
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Conference Article |
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Year |
1978 |
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Izv. Akad. Nauk SSSR, Seriya Fizicheskaya |
Abbreviated Journal |
Izv. Akad. Nauk SSSR, Seriya Fizicheskaya |
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42 |
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6 |
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1154-1159 |
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Keywords |
Ge, excited states, admixtures |
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Mezhdunarodnaya Kniga 39 Dimitrova Ul., 113095 Moscow, Russia |
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1723 |
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Blagosklonskaya, L. E.; Gershenzon, E. M.; Goltsman, G. N.; Elantev, A. I. |
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Title |
Effect of strong magnetic-field on spectrum of hydrogen-like admixtures in semiconductors |
Type |
Conference Article |
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Year |
1978 |
Publication |
Izv. Akad. Nauk SSSR, Seriya Fizicheskaya |
Abbreviated Journal |
Izv. Akad. Nauk SSSR, Seriya Fizicheskaya |
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Volume |
42 |
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6 |
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1231-1234 |
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spectrum, semiconductors, admixtures, strong magnetic-field |
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Mezhdunarodnaya Kniga 39 Dimitrova Ul., 113095 Moscow, Russia |
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blagosklonskaya1978effect |
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1724 |
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Gershenzon, E. M.; Gol'tsman, G. N.; Emtsev, V. V.; Mashovets, T. V.; Ptitsyna, N. G.; Ryvkin, S. M. |
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Title |
Role of impurities of groups III and V in the formation of defects following γ irradiation of germanium |
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Journal Article |
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Year |
1971 |
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JETP Lett. |
Abbreviated Journal |
JETP Lett. |
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Volume |
14 |
Issue |
6 |
Pages |
241 |
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Ge, gamma irradiation, defects, impurities |
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1742 |
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Zhang, X.; Lita, A. E.; Smirnov, K.; Liu, H. L.; Zhu, D.; Verma, V. B.; Nam, S. W.; Schilling, A. |
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Title |
Strong suppression of the resistivity near the superconducting transition in narrow microbridges in external magnetic fields |
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Journal Article |
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2020 |
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Phys. Rev. B |
Abbreviated Journal |
Phys. Rev. B |
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Volume |
101 |
Issue |
6 |
Pages |
060508 (1 to 6) |
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Keywords |
MoSi, WSi films |
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We have investigated a series of superconducting bridges based on homogeneous amorphous WSi and MoSi films, with bridge widths w ranging from 2 to 1000μm and film thicknesses d∼4−6 and 100 nm. Upon decreasing the bridge widths below the respective Pearl lengths, we observe in all cases distinct changes in the characteristics of the resistive transitions to superconductivity. For each of the films, the resistivity curves R(B,T) separate at a well-defined and field-dependent temperature T∗(B) with decreasing the temperature, resulting in a dramatic suppression of the resistivity and a sharpening of the transitions with decreasing bridge width w. The associated excess conductivity in all the bridges scales as 1/w, which may suggest either the presence of a highly conducting region that is dominating the electric transport, or a change in the vortex dynamics in narrow enough bridges. We argue that this effect can only be observed in materials with sufficiently weak vortex pinning. |
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2469-9950 |
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1800 |
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Shcheslavskiy, V.; Morozov, P.; Divochiy, A.; Vakhtomin, Y.; Smirnov, K.; Becker, W. |
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Erratum: “Ultrafast time measurements by time-correlated single photon counting coupled with superconducting single photon detector” [Rev. Sci. Instrum. 87, 053117 (2016)] |
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Miscellaneous |
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2016 |
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Rev. Sci. Instrum. |
Abbreviated Journal |
Rev. Sci. Instrum. |
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87 |
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6 |
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069901 |
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SSPD, SNSPD, TCSPC, jitter |
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In the original paper1the Ref. 10 should be M. Sanzaro, N. Calandri, A. Ruggeri, C. Scarcella, G. Boso, M. Buttafava, and A. Tosi, Proc. SPIE9370, 93701T (2015). |
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Becker & Hickl GmbH, Nahmitzer Damm 30, Berlin 12277, Germany |
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0034-6748 |
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PMID:27370512 |
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1810 |
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Hajenius, M.; Baselmans, J. J. A.; Gao, J. R.; Klapwijk, T. M.; de Korte, P. A. J.; Voronov, B.; Gol'tsman, G. |
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Title |
Low noise NbN superconducting hot electron bolometer mixers at 1.9 and 2.5 THz |
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Journal Article |
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Year |
2004 |
Publication |
Supercond. Sci. Technol. |
Abbreviated Journal |
Supercond. Sci. Technol. |
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Volume |
17 |
Issue |
5 |
Pages |
S224-S228 |
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Keywords |
NbN HEB mixers |
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NbN phonon-cooled hot electron bolometer mixers (HEBs) have been realized with negligible contact resistance between the bolometer itself and the contact structure. Using a combination of in situ cleaning of the NbN film and the use of an additional superconducting interlayer of a 10 nm NbTiN layer between the Au of the contact structure and the NbN film superior noise temperatures have been obtained as low as 950 K at 2.5 THz and 750 K at 1.9 THz. Here we address in detail the DC characterization of these devices, the interface transparencies between the bolometers and the contacts and the consequences of these factors on the mixer performance. |
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0953-2048 |
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558 |
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Divochiy, Aleksander; Marsili, Francesco; Bitauld, David; Gaggero, Alessandro; Leoni, Roberto; Mattioli, Francesco; Korneev, Alexander; Seleznev, Vitaliy; Kaurova, Nataliya; Minaeva, Olga; Gol'tsman, Gregory; Lagoudakis, Konstantinos G.; Benkhaoul, Moushab; Lévy, Francis; Fiore, Andrea |
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Superconducting nanowire photon-number-resolving detector at telecommunication wavelengths |
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Journal Article |
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Year |
2008 |
Publication |
Nat. Photon. |
Abbreviated Journal |
Nat. Photon. |
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2 |
Issue |
5 |
Pages |
302-306 |
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SSPD, photon-number-resolving |
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Optical-to-electrical conversion, which is the basis of the operation of optical detectors, can be linear or nonlinear. When high sensitivities are needed, single-photon detectors are used, which operate in a strongly nonlinear mode, their response being independent of the number of detected photons. However, photon-number-resolving detectors are needed, particularly in quantum optics, where n-photon states are routinely produced. In quantum communication and quantum information processing, the photon-number-resolving functionality is key to many protocols, such as the implementation of quantum repeaters1 and linear-optics quantum computing2. A linear detector with single-photon sensitivity can also be used for measuring a temporal waveform at extremely low light levels, such as in long-distance optical communications, fluorescence spectroscopy and optical time-domain reflectometry. We demonstrate here a photon-number-resolving detector based on parallel superconducting nanowires and capable of counting up to four photons at telecommunication wavelengths, with an ultralow dark count rate and high counting frequency. |
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916 |
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Semenov, Alexei; Richter, Heiko; Smirnov, Konstantin; Voronov, Boris; Gol'tsman, Gregory; Hübers, Heinz-Wilhelm |
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The development of terahertz superconducting hot-electron bolometric mixers |
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Journal Article |
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2004 |
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Supercond. Sci. Technol. |
Abbreviated Journal |
Supercond. Sci. Technol. |
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17 |
Issue |
5 |
Pages |
436-439 |
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NbN HEB mixers |
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We present recent advances in the development of NbN hot-electron bolometric (HEB) mixers for flying terahertz heterodyne receivers. Three important issues have been addressed: the quality of the source NbN films, the effect of the bolometer size on the spectral properties of different planar feed antennas, and the local oscillator (LO) power required for optimal operation of the mixer. Studies of the NbN films with an atomic force microscope indicated a surface structure that may affect the performance of the smallest mixers. Measured spectral gain and noise temperature suggest that at frequencies above 2.5 THz the spiral feed provides better overall performance than the double-slot feed. Direct measurements of the optimal LO power support earlier estimates made in the framework of the uniform mixer model. |
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Manova, N. N.; Korneeva, Yu. P.; Korneev, A. A.; Slysz, W.; Voronov, B. M.; Gol'tsman, G. N. |
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Superconducting NbN single-photon detector integrated with quarter-wave resonator |
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2011 |
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Tech. Phys. Lett. |
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Tech. Phys. Lett. |
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37 |
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5 |
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469-471 |
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SSPD, SNSPD |
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The spectral dependence of the quantum efficiency of superconducting NbN single-photon detectors integrated with quarter-wave resonators based on Si3N4, SiO2, and SiO layers has been studied. |
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RPLAB @ gujma @ |
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664 |
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Васильева, И. А.; Компанеец, В. В.; Красная, Ж. А.; Чижикова, З. А. |
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Проявление внутримолекулярных вибронных взаимодействий в тонкоструктурных спектрах флуоресценции и возбуждения флуоресценции полиеновых δ-диметиламинокетонов |
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2011 |
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Оптический журнал |
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Опт. ж. |
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78 |
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5 |
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3-8 |
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спектры флуоресценции; вибрационный анализ; адиабатическое гармоническое приближение; бесфононная линия; фононное крыло |
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Проведен вибрационный анализ спектров флуоресценции и возбуждения флуоресценции, полученных методом Шпольского при 4,2 K. Рассчитаны параметры внутримолекулярных взаимодействий двух δ-диметиламинокетонов. Для определения интегральных интенсивностей вибронных полос в спектрах с тонкой структурой на интенсивном сплошном фоне выполнено моделирование спектров путем представления полосы каждого из вибронных переходов бесфононной линией и фононным крылом с определенными параметрами (полуширинами, фактором Дебая–Валлера). Показано, что нарушение зеркальной симметрии в сопряженных спектрах флуоресценции и возбуждения флуоресценции этих двух соединений может быть обÑŠяснено интерференцией франк-кондоновского и герцберг-теллеровского взаимодействий. |
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