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Author | Nebosis, R. S.; Heusinger, M. A.; Semenov, A. D.; Lang, P. T.; Schatz, W.; Steinke, R.; Renk, K. F.; Gol'tsman, G. N.; Karasik, B. S.; Gershenzon, E. M. | ||||
Title | Ultrafast photoresponse of an YBa2Cu3O7-δ film to far-infrared radiation pulses | Type | Journal Article | ||
Year | 1993 | Publication | Opt. Lett. | Abbreviated Journal | Opt. Lett. |
Volume | 18 | Issue | 2 | Pages ![]() |
96-97 |
Keywords | YBCO HTS detectors | ||||
Abstract | We report the observation of an ultrafast photoresponse of a high-T(c), film to far-infrared radiation pulses. The response of a sample, consisting of a current-carrying structured YBa(2)Cu(3)O(7-delta) film cooled to liquid-nitrogen temperature, was studied by use of ultrashort laser pulses from an optically pumped far-infrared laser in the frequency range from 0.7 to 7 THz. We found that the response time was limited by the time resolution, 120 ps, of our electronic registration equipment. | ||||
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Language | English | Summary Language | Original Title | ||
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ISSN | 0146-9592 | ISBN | Medium | ||
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Notes | PMID:19802049 | Approved | no | ||
Call Number | Serial | 1660 | |||
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Author | Gershenzon, E. M.; Orlov, L. A.; Ptitsina, N. G. | ||||
Title | Absorption spectra in electron transitions between excited states of impurities in germanium | Type | Journal Article | ||
Year | 1975 | Publication | JETP Lett. | Abbreviated Journal | JETP Lett. |
Volume | 22 | Issue | 4 | Pages ![]() |
95-97 |
Keywords | Ge, impurities, excited states, absorption spectra | ||||
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Notes | Approved | no | |||
Call Number | Serial | 1773 | |||
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Author | Tuchak, A. N.; Gol’tsman, G. N.; Kitaeva, G. K.; Penin, A. N.; Seliverstov, S. V.; Finkel, M. I.; Shepelev, A. V.; Yakunin, P. V. | ||||
Title | Generation of nanosecond terahertz pulses by the optical rectification method | Type | Journal Article | ||
Year | 2012 | Publication | JETP Lett. | Abbreviated Journal | JETP Lett. |
Volume | 96 | Issue | 2 | Pages ![]() |
94-97 |
Keywords | optical rectification, lithium niobate crystal | ||||
Abstract | The possibility of the generation of quasi-cw terahertz radiation by the optical rectification method for broad-band Fourier unlimited nanosecond laser pulses has been experimentally demonstrated. The broadband radiation of a LiF dye-center laser is used as a pump source of a nonlinear optical oscillator. The energy efficiency of terahertz optical frequency conversion in a periodically polarized lithium niobate crystal is 4 × 10−9 at a pump power density of 7 MW/cm2. | ||||
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ISSN | 0021-3640 | ISBN | Medium | ||
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Notes | Approved | no | |||
Call Number | Serial | 1377 | |||
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Author | Gershenzon, E. M.; Gol'tsman, G.; Ptitsina, N. G. | ||||
Title | Energy spectrum of free excitons in germanium | Type | Journal Article | ||
Year | 1973 | Publication | JETP Lett. | Abbreviated Journal | JETP Lett. |
Volume | 18 | Issue | 3 | Pages ![]() |
93 |
Keywords | Ge, free excitons, energy spectrum | ||||
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Notes | Approved | no | |||
Call Number | Serial | 1734 | |||
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Author | Meledin, Denis; Pavolotsky, Alexey; Desmaris, Vincent.; Lapkin, Igor; Risacher, Christophe; Perez, Victor; Henke, Douglas; Nystrom, Olle; Sundin, Erik; Dochev, Dimitar; Pantaleev, Miroslav; Fredrixon, Mathias; Strandberg, Magnus; Voronov, Boris; Goltsman, Gregory; Belitsky, Victor | ||||
Title | A 1.3-THz balanced waveguide HEB mixer for the APEX telescope | Type | Journal Article | ||
Year | 2009 | Publication | IEEE Trans. Microw. Theory Techn. | Abbreviated Journal | |
Volume | 57 | Issue | 1 | Pages ![]() |
89-98 |
Keywords | HEB, mixer, waveguide, balanced, NbN | ||||
Abstract | In this paper, we report about the development, fabrication, and characterization of a balanced waveguide hot electron bolometer (HEB) receiver for the Atacama Pathfinder EXperiment telescope covering the frequency band of 1.25–1.39 THz. The receiver uses a quadrature balanced scheme and two HEB mixers, fabricated from 4- to 5-nm-thick NbN film deposited on crystalline quartz substrate with an MgO buffer layer in between. We employed a novel micromachining method to produce all-metal waveguide parts at submicrometer accuracy (the main-mode waveguide dimensions are 90×180 μm). We present details on the mixer design and measurement results, including receiver noise performance, stability and “first-light†at the telescope site. The receiver yields a double-sideband noise temperature averaged over the RF band below 1200 K, and outstanding stability with a spectroscopic Allan time more than 200 s. | ||||
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ISSN | 0018-9480 | ISBN | Medium | ||
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Notes | Approved | no | |||
Call Number | RPLAB @ lobanovyury @ | Serial | 554 | ||
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Author | Aksaev, E. E.; Gershenzon, E. M.; Gershenson, M. E.; Goltsman, G. N.; Semenov, A. D.; Sergeev, A. V. | ||||
Title | Prospects for using high-temperature superconductors to create electron bolometers | Type | Journal Article | ||
Year | 1989 | Publication | Pisma v Zhurnal Tekhnicheskoi Fiziki | Abbreviated Journal | Pisma v Zhurnal Tekhnicheskoi Fiziki |
Volume | 15 | Issue | 14 | Pages ![]() |
88-93 |
Keywords | HTS HEB | ||||
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Language | Russian | Summary Language | Original Title | ||
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Series Volume | Series Issue | Edition | |||
ISSN | 0320-0116 | ISBN | Medium | ||
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Notes | Перспективы применения высокотемпературных сверхпроводников для создания электронных болометров | Approved | no | ||
Call Number | Serial | 1693 | |||
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Author | Gershenzon, E. M.; Gershenson, M. E.; Goltsman, G. N.; Karasik, B. S.; Lyulkin, A. M.; Semenov, A. D. | ||||
Title | Fast-response superconducting electron bolometer | Type | Journal Article | ||
Year | 1989 | Publication | Pisma v Zhurnal Tekhnicheskoi Fiziki | Abbreviated Journal | Pisma v Zhurnal Tekhnicheskoi Fiziki |
Volume | 15 | Issue | 3 | Pages ![]() |
88-92 |
Keywords | Nb HEB | ||||
Abstract | The general design, operation, and performance characteristics of fast-response electronic bolometers using a thin superconducting Nb film on a leucosapphire substrate are briefly reviewed. The volt-watt sensitivity of the bolometrs is 2,000-200,000 V/W, the operating temperature is 1.6 K, and the time constant is 4-4.5 ns. | ||||
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Language | Russian | Summary Language | Original Title | ||
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Notes | Approved | no | |||
Call Number | Serial | 1694 | |||
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Author | Shurakov, A.; Tong, Cheuk-yu E.; Grimes, P.; Blundell, R.; Golt'sman, G. | ||||
Title | A microwave reflection readout scheme for hot electron bolometric direct detector | Type | Journal Article | ||
Year | 2015 | Publication | IEEE Trans. THz Sci. Technol. | Abbreviated Journal | IEEE Trans. THz Sci. Technol. |
Volume | 5 | Issue | Pages ![]() |
81-84 | |
Keywords | HEB detectors | ||||
Abstract | In this paper, we propose and present data from a fast THz detector based on the repurpose of hot electron bolometer mixers (HEB) fabricated from superconducting NbN thinfilm. This detector is essentially a traditional NbN bolometer element that operates under the influence of a microwave pump. The in-jected microwave power serves the dual purpose of enhancing the detector sensitivity and reading out the impedance changes of the device in response to incidentTHz radiation. We have measured an optical Noise Equivalent Power of 4 pW/ Hz for our detector at a bath temperature of 4.2 K. The measurement frequency was 0.83 THz and the modulation frequency was 1.48 kHz. The readout scheme is versatile and facilitates both high-speed operation as well as multi-pixel applications. |
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Notes | Approved | no | |||
Call Number | RPLAB @ atomics90 @ | Serial | 950 | ||
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Author | Расулова, Г.К.; Брунков, П.Н.; Пентин, И.В.; Ковалюк, В.В.; Горшков, К.Н.; Казаков, А.Ю.; Иванов, С.Ю.; Егоров, А.Ю.; Саксеев, Д.А.; Конников, С.Г. | ||||
Title | Взаимная синхронизация двух связанных генераторов автоколебаний на основе сверхрешеток GaAs/AlGaAs | Type | Journal Article | ||
Year | 2011 | Publication | Журнал технической физики | Abbreviated Journal | ЖТФ |
Volume | 81 | Issue | 6 | Pages ![]() |
80-86 |
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Abstract | Проведено исследование взаимодействия генераторов автоколебаний на основе 30-периодной слабосвязанной сверхрешетки GaAs/AlGaAs. Воздействие одного генератора автоколебаний на другой осуществлялось при заданном постоянном смещении в отсутствие в одном из них генерации автономных колебаний. Показано, что вынужденные колебания в захватывающем генераторе возникают из-за возбуждения колебаний в системе связанных осцилляторов, образующих границу электрополевого домена на частоте одной из высших гармоник вынуждающего колебания. | ||||
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Notes | Approved | no | |||
Call Number | RPLAB @ gujma @ | Serial | 711 | ||
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Author | Третьяков, И.В.; Рябчун, С.А.; Каурова, Н.С.; Ларионов, П.А.; Лобастова, А.А.; Воронов, Б.М.; Финкель, М.И.; Гольцман, Г.Н. | ||||
Title | Оптимальная поглощенная мощность гетеродина для терагерцового сверхпроводникового NbN смесителя на электронном разогреве | Type | Journal Article | ||
Year | 2010 | Publication | Письма в Журнал технической физики | Abbreviated Journal | Письма в ЖТФ |
Volume | 36 | Issue | 23 | Pages ![]() |
78-84 |
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Abstract | Представлены результаты измерений поглощенной мощности гетеродина малошумящим широкополосным смесителем на эффекте электронного разогрева в резистивном состоянии сверхпроводниковой ультратонкой пленки NbN. Оптимальная поглощенная мощность гетеродина составила около 100 nW на частоте 2.5 THz. | ||||
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Notes | Approved | no | |||
Call Number | RPLAB @ gujma @ | Serial | 703 | ||
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Author | Korneev, A.; Korneeva, Y.; Florya, I.; Voronov, B.; Goltsman, G. | ||||
Title | NbN nanowire superconducting single-photon detector for mid-infrared | Type | Journal Article | ||
Year | 2012 | Publication | Phys. Procedia | Abbreviated Journal | Phys. Procedia |
Volume | 36 | Issue | Pages ![]() |
72-76 | |
Keywords | NbN SSPD, SNSPD | ||||
Abstract | Superconducting single-photon detectors (SSPD) is typically 100 nm-wide supercondiucting strip in a shape of meander made of 4-nm-thick film. To reduce response time and increase voltage response a parallel connection of the strips was proposed. Recently we demonstrated that reduction of the strip width improves the quantum effciency of such a detector at wavelengths longer than 1.5 μm. Being encourage by this progress in quantum effciency we improved the fabrication process and made parallel-wire SSPD with 40-nm-wide strips covering total area of 10 μm x 10 μm. In this paper we present the results of the characterization of such a parallel-wire SSPD at 10.6 μm wavelength and demonstrate linear dependence of the count rate on the light power as it should be in case of single-photon response. | ||||
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ISSN | 1875-3892 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | Approved | no | |||
Call Number | Serial | 1382 | |||
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Author | Ожегов, Р.В.; Горшков, К.Н.; Окунев, О.В.; Гольцман, Г.Н. | ||||
Title | Сверхпроводниковый смеситель на эффекте электронного разогрева как элемент матрицы системы построения тепловых изображений | Type | Journal Article | ||
Year | 2010 | Publication | Письма в Журнал технической физики | Abbreviated Journal | Письма в ЖТФ |
Volume | 36 | Issue | 21 | Pages ![]() |
70-78 |
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Abstract | Исследована возможность использования матрицы чувствительных элементов на гиперполусферической линзе диаметром 12 mm в тепловизоре терагерцевого диапазона частот. Получены размеры области на линзе, приемлемой для расположения матрицы, в которой шумовая температура приемника меняется в пределах 16% от средней. Диаметр этой области составил 3.3% диаметра линзы.Получены отклонения основного лепестка диаграммы направленности, которые составили ±1.25â—<a6> от направления с оптимальным положением смесителя. Флуктуационная чувствительность приемника в эксперименте составила 0.5 K на частоте 300 GHz. | ||||
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Notes | Approved | no | |||
Call Number | RPLAB @ gujma @ | Serial | 704 | ||
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Author | Korneev, A.; Finkel, M.; Maslennikov, S.; Korneeva, Yu.; Florya, I.; Tarkhov, M.; Elezov, M.; Ryabchun, S.; Tretyakov, I.; Isupova, A.; Voronov, B.; Goltsman, G. | ||||
Title | Superconducting NbN terahertz detectors and infrared photon counters | Type | Journal Article | ||
Year | 2010 | Publication | Вестник НГУ. Серия: физ. | Abbreviated Journal | Вестник НГУ. Серия: физ. |
Volume | 5 | Issue | 4 | Pages ![]() |
68-72 |
Keywords | HEB; HEB mixer | ||||
Abstract | We present our recent achievements in the development of sensitive and ultrafast thin-film superconducting sensors: hot-electron bolometers (HEB), HEB-mixers for terahertz range and infrared single-photon counters. These sensors have already demonstrated a performance that makes them devices-of-choice for many terahertz and optical applications. Keywords: Hot electron bolometer mixers, infrared single-photon detectors, superconducting device fabrication, superconducting NbN films. | ||||
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ISSN | 1818-7994 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | УДК 538.9 | Approved | no | ||
Call Number | RPLAB @ gujma @ | Serial | 708 | ||
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Author | Neroev, V. V.; Iomdina, E. N.; Khandzhyan, A. T.; Khodzhabekyan, N. V.; Sengaeva, M. D.; Ivanova, A. V.; Seliverstov, S. V.; Teplyakova, K. O.; Goltsman, G. N. | ||||
Title | Experimental study of the effect of corneal hydration and its biomechanical properties on the results of photorefractive keratectomy | Type | Journal Article | ||
Year | 2021 | Publication | Vestn. Oftalmol. | Abbreviated Journal | Vestn. Oftalmol. |
Volume | 137 | Issue | 3 | Pages ![]() |
68-75 |
Keywords | THz scanning, cornea, photorefractive keratectomy, medicine | ||||
Abstract | Water content in the cornea may affect the outcome of its excimer laser ablation, especially in presbyopic patients with myopic refraction. This hypothesis can be tested by scanning the cornea in the terahertz (THz) range to determine its hydration level. Purpose: To study the effect of hydration of the cornea determined by non-contact THz scanning and its biomechanical parameters on the results of photorefractive keratectomy (PRK) in an experiment. Material and methods: PRK was performed using the Nidek EC-5000 QUEST excimer laser on 8 rabbit eyes. Corneal hydration was evaluated by determining the reflection coefficient (RC) in the THz electromagnetic radiation range before PRK, after 3-5 days, and after 1, 2, 3, and 4 months. Clinical examination included autorefractometry, assessment of corneal thickness and other anatomical and optical parameters of the anterior eye segment (Galilei G6, Ziemer Ophthalmic Systems AG 6.0.2, Switzerland), measurement of corneal hysteresis (CH) and corneal resistance factor (CRF) using the Ocular Response Analyzer (ORA; Reichert, USA), as well as tear production (Schirmer test). Results: The initial water content in the cornea has a significant effect on the thickness of the removed layer, i.e. on the PRK effect, with correlation coefficient of Rs= -0.976 (p<0.01). The correlation between CH and the ablation depth is less pronounced (Rs=0.643), and CRF had no correlation with it (Rs= -0.089). Biomechanical indicators of the cornea depend on its hydration: changes in CH and CRF after excimer laser ablation qualitatively coincide with changes in RC, the correlation coefficient between RC and the initial value of CH is R= -0.619 (moderate negative correlation). Conclusion: THz scanning is an effective non-contact technology for monitoring corneal hydration level. The mismatch of the hypoeffect of keratorefractive excimer laser intervention planned for patients with presbyopia with the actual outcome can be caused by individual decrease in the initial water content in the cornea. |
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Language | Russian | Summary Language | Original Title | ||
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Notes | Approved | no | |||
Call Number | Serial | 1794 | |||
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Author | Гольцман, Г. Н.; Разумовская, И. В.; Окунев, О. В; Чулкова, Г. М.; Корнеев, А. А.; Финкель, М. И.; Масленников, С. Н.; Семенов, А. В.; Александров, В. Н. | ||||
Title | Сборник программ учебных дисциплин профессионального цикла подготовки магистров и бакалавров по направлению «Физика» | Type | Journal Article | ||
Year | 2011 | Publication | Прометей | Abbreviated Journal | Прометей |
Volume | Issue | Pages ![]() |
67 | ||
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Notes | Учебное пособие | Approved | no | ||
Call Number | RPLAB @ gujma @ | Serial | 717 | ||
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