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| Author | Ожегов, Р.В.; Окунев, О.В.; Гольцман, Г.Н. | ||||
| Title | Флуктуационная чувствительность сверхпроводящего болометрического смесителя на эффекте разогрева электронного газа | Type | Journal Article | ||
| Year | 2009 | Publication | Радиотехника | Abbreviated Journal | |
| Volume | Issue | 3 | Pages | 120-124 | |
| Keywords | смеситель на горячих электронах; флуктуационная чувствительность; тепловизор терагерцевого диапазона частот; hot-electron bolometer mixer; Imaging system; Noise equivalent temperature difference; Heterodyne receiver; Terahertz range | ||||
| Abstract | Interest in research in the terahertz range is driven by a great number of various applications, where terahertz instruments may play a leading role. To name just a few, such applications include study of the cosmic microwave background radiation and the distribution of the dark matter, medicine, navigation, fire alarm, security systems and environmental monitoring. The paper discusses the possibility of using a receiver based on the hot-electron effect in superconducting films as an imaging system. We present the results of the noise equivalent temperature difference (NETD) measurements performed with a hot-electron bolometer mixer made from a thin superconducting film. The receiver with a noise temperature of ~ 3800 K at a local oscillator frequency of 300 GHz a bandwidth of 500 MHz and an integration time of 1 s has offered an NETD of 0.5 K. We have also developed a technique that enabled us to reduce the contribution of the mixer gain fluctuations to the overall system instability. As of this writing, the above value of the NETD is the lowest value offered for this type of receiver, which indicates the possibility to use such receivers in real-time imaging systems. The technique offered in the paper for achieving the limiting value of the NETD offers an alternative to the phase-locking scheme. Представены результаты измерения флуктуационной чувствительности (NETD – noise equivalent temperature difference) болометрического смесителя на эффекте разогрева электронного газа в тонких сверхпроводящих пленках. Получено предельное значение NETD, равное 0,5 К, при шумовой температуре приемника 3800 К, ширине полосы преобразования 500 МГц, постоянной времени 1 с и частоте гетеродина 300 ГГц. Разработана методика достижения предельной флуктуационной чувствительности, позволяющая избежать влияния нестабильности коэффициента преобразования смесителя. |
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| Notes | Approved | no | |||
| Call Number | RPLAB @ gujma @ | Serial | 728 | ||
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| Author | Hu, Xiaolong; Dauler, Eric A.; Kerman, Andrew J.; Yang, Joel K. W.; White, James E.; Herder, Charles H.; Berggren, Karl K. | ||||
| Title | Using surface plasmons to enhance the speed and efficiency of superconducting nanowire single-photon detectors | Type | Conference Article | ||
| Year | 2009 | Publication | Proceedings of the Conference on Lasers and Electro-Optics, 2009 and 2009 Conference on Quantum electronics and Laser Science Conference | Abbreviated Journal | Proc of Conf. on Lasers and El.-Opt. |
| Volume | Issue | Pages | 1-2 | ||
| Keywords | optical antennas | ||||
| Abstract | We report our design and fabrication of superconducting nanowire single-photon detectors integrated with gold plasmonic nanostructures, which can enhance the absorption of TM-polarized light, and can enlarge the effective area without sacrificing detector speed. | ||||
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| Notes | Approved | no | |||
| Call Number | RPLAB @ gujma @ | Serial | 744 | ||
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| Author | Bharadwaj, Palash; Deutsch, Bradley; Novotny, Lukas | ||||
| Title | Optical Antennas | Type | Journal Article | ||
| Year | 2009 | Publication | Advances in Optics and Photonics | Abbreviated Journal | Adv. Opt. Photon |
| Volume | 1 | Issue | Pages | 438-483 | |
| Keywords | optical antennas | ||||
| Abstract | Optical antennas are an emerging concept in physical optics. Similar to radiowave and microwave antennas, their purpose is to convert the energy of free propagating radiation to localized energy, and vice versa. Optical antennas exploit the unique properties of metal nanostructures, which behave as strongly coupled plasmas at ptical frequencies. The tutorial provides an account of the historical origins and the basic concepts and parameters associated with optical antennas. It also reviews recent work in the field and discusses areas of application, such as light-emitting devices, photovoltaics, and spectroscopy. |
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| Call Number | RPLAB @ gujma @ | Serial | 754 | ||
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| Author | Esteban, Eduin; Serna, Hernandez | ||||
| Title | Quantum key distribution protocol with private-public key | Type | Journal Article | ||
| Year | 2009 | Publication | arXiv | Abbreviated Journal | arXiv |
| Volume | Issue | Pages | 3 | ||
| Keywords | quantum cryptography; QKD; protocol | ||||
| Abstract | A quantum cryptographic protocol based in public key cryptography combinations and private key cryptography is presented. Unlike the BB84 protocol 1 and its many variants 2,3 two quantum channels are used. The present research does not make reconciliation mechanisms of information to derive the key. A three related system of key distribution are described. | ||||
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| Notes | arXiv: 0908.2146 | Approved | no | ||
| Call Number | RPLAB @ gujma @ | Serial | 756 | ||
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| Author | Zurek, Wojciech Hubert | ||||
| Title | Quantum Darwinism | Type | Journal Article | ||
| Year | 2009 | Publication | Nature Physics | Abbreviated Journal | Nat. Phys. |
| Volume | 5 | Issue | 3 | Pages | 181-188 |
| Keywords | fromIPMRAS | ||||
| Abstract | Quantum Darwinism describes the proliferation, in the environment, of multiple records of selected states of a quantum system. It explains how the quantum fragility of a state of a single quantum system can lead to the classical robustness of states in their correlated multitude; shows how effective `wave-packet collapse' arises as a result of the proliferation throughout the environment of imprints of the state of the system; and provides a framework for the derivation of Born's rule, which relates the probabilities of detecting states to their amplitudes. Taken together, these three advances mark considerable progress towards settling the quantum measurement problem. | ||||
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| Notes | Approved | no | |||
| Call Number | RPLAB @ gujma @ | Serial | 799 | ||
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| Author | Shor, Peter W. | ||||
| Title | Quantum information theory: The bits don't add up | Type | Journal Article | ||
| Year | 2009 | Publication | Nature Physics | Abbreviated Journal | Nat. Phys. |
| Volume | 5 | Issue | Pages | 247 - 248 | |
| Keywords | fromIPMRAS | ||||
| Abstract | A counterexample to the 'additivity question', the most celebrated open problem in the mathematical theory of quantum information, casts doubt on the possibility of finding a simple expression for the information capacity of a quantum channel. | ||||
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| Notes | Approved | no | |||
| Call Number | RPLAB @ gujma @ | Serial | 800 | ||
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| Author | Trabesinger, Andreas | ||||
| Title | Quantum mechanics: Shaken foundations | Type | Journal Article | ||
| Year | 2009 | Publication | Nature Physics | Abbreviated Journal | Nat. Phys. |
| Volume | 5 | Issue | 12 | Pages | 863 |
| Keywords | fromIPMRAS | ||||
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| Notes | Approved | no | |||
| Call Number | RPLAB @ gujma @ | Serial | 802 | ||
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| Author | Benford, Dominic; Moseley, Harvey; Zmuidzinas, Jonas | ||||
| Title | Direct detectors for the Einstein inflation probe | Type | Conference Article | ||
| Year | 2009 | Publication | J. Phys.: Conf. Ser. | Abbreviated Journal | J. Phys.: Conf. Ser. |
| Volume | 155 | Issue | 1 | Pages | 012001 (1 to 49) |
| Keywords | KID, MKID, CMB | ||||
| Abstract | Here we review the principles of operation, history, present status, and future prospects for the primary candidate detectors for Cosmic Microwave Background (CMB) polarization studies. The three detector types we will discuss are semiconductor-based bolometers, superconducting transition edge sensor (TES) bolometer, and Microwave Kinetic Inductance Detectors (MKIDs). All of these detector types can provide the sensitivity to permit background-limited measurements of the CMB, but the ultimate selection of detectors will be largely determined by the ease of production and reliability of large arrays of such detectors. This paper describes the present state of development of these detectors, efforts to integrate them into large arrays, and the detector system developments necessary to enable a space CMB polarization mission. | ||||
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| Notes | Recommended by Klapwijk | Approved | no | ||
| Call Number | Serial | 913 | |||
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| Author | Khosropanah P.; Baryshev A.; Zhang W.; Jellema W.; Hovenier J.N.; Gao G.R.; Klapwijk T.M; Paveliev D.G.; Williams B.S.; Kumar S.; Hu Q.; Reno J.L.; Klein B.; Hesler J.L. | ||||
| Title | Phase-locking of a 2.7-THz quantum cascade laser to a microwave reference | Type | Journal Article | ||
| Year | 2009 | Publication | Optics Letters | Abbreviated Journal | |
| Volume | 34 | Issue | Pages | 2958-2960 | |
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| Abstract | We demonstrate the phase locking of a 2.7 THz metal–metal waveguide quantum cascade laser (QCL) to an external microwave signal. The reference is the 15th harmonic, generated by a semiconductor superlattice nonlinear device, of a signal at 182 GHz, which itself is generated by a multiplier chain (X12) from a microwave synthesizer at ~ 15 GHz. Both laser and reference radiations are coupled into a bolometer mixer, resulting in a beat signal, which is fed into a phase-lock loop. The spectral analysis of the beat signal con-firms that the QCL is phase locked. This result opens the possibility to extend heterodyne interferometers into the far-infrared range. |
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| Call Number | RPLAB @ atomics90 @ | Serial | 966 | ||
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| Author | Флоря, И. Н. | ||||
| Title | Ультрабыстрый однофотонный детектор для оптических применений | Type | Conference Article | ||
| Year | 2009 | Publication | Науч. сессия МИФИ | Abbreviated Journal | Науч. сессия МИФИ |
| Volume | Issue | Pages | 45-46 | ||
| Keywords | SSPD | ||||
| Abstract | Представлен сверхпроводниковый однофотонный детектор (SSPD) на основе ультратонкой пленки NbN, обладающий рекордным быстродействием. Активный элемент выполнен в виде N сверхпроводящих полосок соединенных параллельно, покрывающих площадку размером 10 мкм х 10 мкм. Для SSPD с N=12 длительность импульса напряжения составляет 200 пс. Полученные результаты открывают путь к детекторам обладающими скоростью счета свыше 1 ГГц, что делает SSPDs весьма привлекательными во многих применениях, в частности для квантовой криптографии. SSPD хорошо согласуется с оптоволокном и легко может быть интегрирован в полностью готовую для работы приемную систему. | ||||
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| ISSN | ISBN | 978-5-7262-1042-1 | Medium | ||
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| Notes | УДК 533.14(06)+004.056(06) Фотоника и информационная оптика | Approved | no | ||
| Call Number | Serial | 1145 | |||
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