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Korneeva, Y.; Sidorova, M.; Semenov, A.; Krasnosvobodtsev, S.; Mitsen, K.; Korneev, A.; Chulkova, G.; Goltsman, G. |
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Title |
Comparison of hot-spot formation in NbC and NbN single-photon detectors |
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Journal Article |
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Year |
2016 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
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26 |
Issue |
3 |
Pages |
1-4 |
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Keywords |
NbC, NbN SSPD, SNSPD |
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Abstract |
We report an experimental investigation of the hot-spot evolution in superconducting single-photon detectors made of disordered superconducting materials with different diffusivity and energy downconversion time values, i.e., 33-nm-thick NbN and 23-nm-thick NbC films. We have demonstrated that, in NbC film, only 405-nm photons produce sufficiently large hot spot to trigger a single-photon response. The dependence of detection efficiency on bias current for 405-nm photons in NbC is similar to that for 3400-nm photons in NbN. In NbC, large diffusivity and downconversion time result in 1-D critical current suppression profile compared with the usual 2-D profile in NbN. |
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1051-8223 |
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1348 |
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Fedorov, G. E.; Stepanova, T. S.; Gazaliev, A. S.; Gaiduchenko, I. A.; Kaurova, N. S.; Voronov, B. M.; Goltzman, G. N. |
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Title |
Asymmetric devices based on carbon nanotubes for terahertz-range radiation detection |
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Journal Article |
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Year |
2016 |
Publication |
Semicond. |
Abbreviated Journal |
Semicond. |
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Volume |
50 |
Issue |
12 |
Pages |
1600-1603 |
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Keywords |
carbon nanotubes, CNT detectors |
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Various asymmetric detecting devices based on carbon nanotubes (CNTs) are studied. The asymmetry is understood as inhomogeneous properties along the conducting channel. In the first type of devices, an inhomogeneous morphology of the CNT grid is used. In the second type of devices, metals with highly varying work functions are used as the contact material. The relation between the sensitivity and detector configuration is analyzed. Based on the data obtained, approaches to the development of an efficient detector of terahertz radiation, based on carbon nanotubes are proposed. |
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1063-7826 |
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1776 |
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Столяров, А. В. |
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Программирование. Введение в профессию. Том 1. Азы программирования |
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2016 |
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МАКС Пресс |
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programming, computer science |
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Первый том серии «Программирование: введение в профессию» включает две основные части. В первую часть книги вошли избранные сведения из истории вычислительной техники, обсуждение некоторых областей математики, непосредственно используемых программистами (таких как алгебра логики, комбинаторика, позиционные системы счисления), математических основ программирования (теория вычислимости и теория алгоритмов), принципы построения и функционирования вычислительных систем, начальные сведения о работе с командной строкой ОС Unix. Вторая часть посвящена начальным навыкам составления компьютерных программ на примере Free Pascal под ОС Unix. Материал ориентирован на изучение в будущем языка Си, так что, в частности, много внимания уделено работе с адресами и указателями, построению списков и других динамических структур данных; в то же время многие возможности Паскаля из рассмотрения исключены. Даются сведения о правилах оформления текстов программ, о тестировании и отладке. |
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Москва |
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978-5-317-05222-5 |
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1133 |
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Столяров, А. В. |
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Программирование. Введение в профессию. Том 2. Низкоуровневое программирование |
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2016 |
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programming, computer science |
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Во второй том книги «Программирование: введение в профессию» вошли её третья и четвёртая части. Третья часть книги посвящена программированию на уровне машинных команд на примере ассемблера NASM. Рассматривается «юзерспейсовская» часть системы команд i386, конвенции системных вызовов Linux/i386 и FreeBSD/i386, изучается макропроцессор, раздельная трансляция и работа компоновщика, приведены сведения об арифметике с плавающей точкой. Четвёртая часть, посвящённая языку Си, включает, кроме собственно описания этого языка, также краткие сведения о библиотеке ncurses; рассказ о том, как использовать компилятор Си без его стандартной библиотеки; дополнительные сведения об инструментах сборки и отладки программ; наконец, в книге приводится краткое описание систем контроля версий CVS и git. |
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Москва |
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978-5-317-05301-7 |
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1134 |
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Pyatkov, Felix; Khasminskaya, Svetlana; Fütterling, Valentin; Fechner, Randy; Słowik, Karolina; Ferrari, Simone; Kahl1, Oliver; Kovalyuk, Vadim; Rath, Patrik; Vetter, Andreas; Flavel, Benjamin S.; Hennrich, Frank; Kappes, Manfred M.; Gol’tsman, Gregory N.; Korneev, Alexander; Rockstuhl, Carsten; Krupke, Ralph; Pernice, Wolfram H. P. |
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Title |
Carbon nanotubes as exceptional electrically driven on-chip light sources |
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Miscellaneous |
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2016 |
Publication |
2Physics |
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2Physics |
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carbon nanotubes, CNT |
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Carbon nanotubes (CNTs) belong to the most exciting objects of the nanoworld. Typically, around 1 nm in diameter and several microns long, these cylindrically shaped carbon-based structures exhibit a number of exceptional mechanical, electrical and optical characteristics [1]. In particular, they are promising ultra-small light sources for the next generation of optoelectronic devices, where electrical components are interconnected with photonic circuits.
Few years ago, we demonstrated that electically driven CNTs can serve as waveguide-integrated light sources [2]. Progress in the field of nanotube sorting, dielectrophoretical site-selective deposition and efficient light coupling into underlying substrate has made CNTs suitable for wafer-scale fabrication of active hybrid nanophotonic devices [2,3].
Recently we presented a nanotube-based waveguide integrated light emitters with tailored, exceptionally narrow emission-linewidths and short response times [4]. This allows conversion of electrical signals into well-defined optical signals directly within an optical waveguide, as required for future on-chip optical communication. Schematics and realization of this device is shown in Figure 1. The devices were manufactured by etching a photonic crystal waveguide into a dielectric layer following electron beam lithography. Photonic crystals are nanostructures that are also used by butterflies to give the impression of color on their wings. The same principle has been used in this study to select the color of light emitted by the CNT. The precise dimensions of the structure were numerically simulated to tailor the properties of the final device. Metallic contacts in the vicinity to the waveguide were fabricated to provide electrical access to CNT emitters. Finally, CNTs, sorted by structural and electronic properties, were deposited from a solution across the waveguide using dielectrophoresis, which is an electric-field-assisted deposition technique. |
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2372-1782 |
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1219 |
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