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Гершензон, Е. М.; Литвак-Горская, Л. Б.; Луговая, Г. Я.; Шапиро, Е. З. |
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Title |
Об интерпретации отрицательного магнитосопротивления в случае проводимости по верхней зоне Хаббарда в n-Ge⟨Sb⟩ |
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Journal Article |
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1986 |
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Физика и техника полупроводников |
Abbreviated Journal |
Физика и техника полупроводников |
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20 |
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1 |
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99-103 |
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n-Ge, Hubbard upper zone conductivity, negative magnetoresistance |
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В рамках теории квантовых поправок к проводимости объяснено отрицательное магнитосопротивление в n-Ge с концентрацией доноров Nd≃2.8⋅1016÷1.1⋅1017см−3, наблюдаемое в диапазоне температур 4.2−10 K, когда основной вклад в проводимость дают электроны верхней зоны Хаббарда. Показано, что время релаксации фазы волновой функции τφ определяется временем электрон-фононного взаимодействия τeph. |
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1759 |
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Рябчун, С. А. |
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Title |
Широкополосные высокостабильные терагерцовые смесители на горячих электронах из тонких сверхпроводниковых пленок NbN |
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Manuscript |
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2009 |
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М. МПГУ |
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98 |
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HEB, mixer, terahertz, THz, stability, Allan variance, conversion bandwidth, in-situ technique, Au contacts |
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Ph.D. thesis |
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598 |
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Nikogosyan, A. S.; Martirosyan, R. M.; Hakhoumian, A. A.; Makaryan, A. H.; Tadevosyan, V. R.; Goltsman, G. N.; Antipov, S. V. |
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Effect of absorption on the efficiency of terahertz radiation generation in the metal waveguide partially filled with nonlinear crystal LiNbO3, DAST or ZnTe |
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Journal Article |
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2019 |
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J. Contemp. Phys. |
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J. Contemp. Phys. |
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54 |
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1 |
Pages ![sorted by First Page field, descending order (down)](https://db.rplab.ru/refbase/img/sort_desc.gif) |
97-104 |
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nonlinear crystal, THz, waveguide |
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The influence of terahertz (THz) radiation absorption on the efficiency of generation of coherent THz radiation in the system ‘nonlinear-optical crystal partially filling the cross section of a rectangular metal waveguide’ has been investigated. The efficiency of the nonlinear frequency conversion of optical laser radiation to the THz range depends on the loss in the system and the fulfillment of the phase-matching (FM) condition in a nonlinear crystal. The method of partially filling of a metal waveguide with a nonlinear optical crystal is used to ensure phase matching. The phase matching is achieved by numerical determination of the thickness of the nonlinear crystal, that is the degree of partial filling of the waveguide. The attenuation of THz radiation caused by losses both in the metal walls of the waveguide and in the crystal was studied, taking into account the dimension of the cross section of the waveguide, the degree of partial filling, and the dielectric constant of the crystal. It is shown that the partial filling of the waveguide with a nonlinear crystal results in an increase in the efficiency of generation of THz radiation by an order of magnitude, owing to the decrease in absorption. |
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1068-3372 |
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1289 |
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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. |
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Title |
Ultrafast photoresponse of an YBa2Cu3O7-δ film to far-infrared radiation pulses |
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Journal Article |
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1993 |
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Opt. Lett. |
Abbreviated Journal |
Opt. Lett. |
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18 |
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2 |
Pages ![sorted by First Page field, descending order (down)](https://db.rplab.ru/refbase/img/sort_desc.gif) |
96-97 |
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YBCO HTS detectors |
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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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English |
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0146-9592 |
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PMID:19802049 |
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1660 |
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Gol'tsman, Gregory N.; Vachtomin, Yuriy B.; Antipov, Sergey V.; Finkel, Matvey I.; Maslennikov, Sergey N.; Smirnov, Konstantin V.; Polyakov, Stanislav L.; Svechnikov, Sergey I.; Kaurova, Natalia S.; Grishina, Elisaveta V.; Voronov, Boris M. |
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Title |
NbN phonon-cooled hot-electron bolometer mixer for terahertz heterodyne receivers |
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Conference Article |
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2005 |
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Proc. SPIE |
Abbreviated Journal |
Proc. SPIE |
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5727 |
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95-106 |
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NbN HEB mixers |
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We present the results of our studies of NbN phonon-cooled HEB mixers at terahertz frequencies. The mixers were fabricated from NbN film deposited on a high-resistivity Si substrate with an MgO buffer layer. The mixer element was integrated with a log-periodic spiral antenna. The noise temperature measurements were performed at 2.5 THz and at 3.8 THz local oscillator frequencies for the 3 x 0.2 μm2 active area devices. The best uncorrected receiver noise temperatures found for these frequencies are 1300 K and 3100 K, respectively. A water vapour discharge laser was used as the LO source. The largest gain bandwidth of 5.2 GHz was achieved for a mixer based on 2 nm thick NbN film deposited on MgO layer over Si substrate. The gain bandwidth of the mixer based on 3.5 nm NbN film deposited on Si with MgO is 4.2 GHz and the noise bandwidth for the same device amounts to 5 GHz. We also present the results of our research into decrease of the direct detection contribution to the measured Y-factor and a possible error of noise temperature calculation. The use of a square nickel cell mesh as an IR-filter enabled us to avoid the effect of direct detection and measure apparent value of the noise temperature which was 16% less than that obtained using conventional black polyethylene IR-filter. |
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Terahertz and Gigahertz Electronics and Photonics IV |
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378 |
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Gershenzon, E. M.; Orlov, L. A.; Ptitsina, N. G. |
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Title |
Absorption spectra in electron transitions between excited states of impurities in germanium |
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Journal Article |
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1975 |
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JETP Lett. |
Abbreviated Journal |
JETP Lett. |
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22 |
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4 |
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95-97 |
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Ge, impurities, excited states, absorption spectra |
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1773 |
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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. |
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Title |
Generation of nanosecond terahertz pulses by the optical rectification method |
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Journal Article |
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2012 |
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JETP Lett. |
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JETP Lett. |
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96 |
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2 |
Pages ![sorted by First Page field, descending order (down)](https://db.rplab.ru/refbase/img/sort_desc.gif) |
94-97 |
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optical rectification, lithium niobate crystal |
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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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0021-3640 |
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1377 |
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Елезов, М. С.; Тархов, М. А.; Дивочий, А. В.; Вахтомин, Ю. Б.; Гольцман, Г. Н. |
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Title |
Система регистрации одиночных фотонов в видимом и ближнем инфракрасном диапазонах |
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Conference Article |
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2010 |
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Науч. сессия НИЯУ МИФИ |
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94-95 |
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SSPD |
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978-5-7262-1227-2 |
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RPLAB @ sasha @ елезов2010система |
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1032 |
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Gershenzon, E. M.; Gol'tsman, G.; Ptitsina, N. G. |
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Title |
Energy spectrum of free excitons in germanium |
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1973 |
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JETP Lett. |
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JETP Lett. |
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18 |
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3 |
Pages ![sorted by First Page field, descending order (down)](https://db.rplab.ru/refbase/img/sort_desc.gif) |
93 |
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Ge, free excitons, energy spectrum |
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1734 |
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Манова, Н.Н.; Корнеева, Ю. П.; Корнеев, А. А., Гольцман, Г. Н. |
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Title |
Cверхпроводящий однофотонный детектор, интегрированный с оптическим резонатором |
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Conference Article |
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2010 |
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Науч. сессия НИЯУ МИФИ |
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Науч. сессия НИЯУ МИФИ |
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92-93 |
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978-5-7262-1227-2 |
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УДК 533.14(06)+004.056(06) Фотоника и информационная оптика |
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1143 |
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