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Rasulova, G. K.; Pentin, I. V.; Goltsman, G. N. |
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Title |
Terahertz emission from a weakly-coupled GaAs/AlGaAs superlattice biased into three different modes of current self-oscillations |
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Journal Article |
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2019 |
Publication |
AIP Advances |
Abbreviated Journal |
AIP Advances |
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Volume |
9 |
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10 |
Pages |
105220 |
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Keywords  |
GaAs/AlGaAs superlattice, SL, NbN HEB |
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Radio-frequency modulated terahertz (THz) emission power from weakly-coupled GaAs/AlGaAs superlattice (SL) has been increased by parallel connection of several SL mesas. Each SL mesa is a self-oscillator with its own oscillation frequency and mode. In coupled non-identical SL mesas biased at different voltages within the hysteresis loop the chaotic, quasiperiodic and frequency-locked modes of self-oscillations of current arise. THz emission was detected when three connected in parallel SL mesas were biased into the frequency-locked and quasiperiodic modes of self-oscillations of current, while in the chaotic mode of those it falls to the noise level. |
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2158-3226 |
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1274 |
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Prokhodtsov, A.; Golikov, A.; An, P.; Kovalyuk, V.; Goltsman, G.; Arakelyan, S.; Evlyukhin, A.; Kalachev, A.; Naumov, A. |
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Title |
Effect of silicon oxide coating on a silicon nitride focusing grating coupler efficiency |
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Conference Article |
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2019 |
Publication |
EPJ Web Conf. |
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EPJ Web Conf. |
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Volume |
220 |
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02009 |
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Keywords |
grating coupler, SiO2 |
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The dependence of the efficiency of the focusing grating couplers on the period and filling factor before and after deposition of the upper silicon oxide layer was experimentally studied. The obtained data are of practical importance for tunable integrated-optical devices based on silicon nitride platform. |
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2100-014X |
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1188 |
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Kitaeva, G. K.; Kornienko, V. V.; Kuznetsov, K. A.; Pentin, I. V.; Smirnov, K. V.; Vakhtomin, Y. B. |
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Title |
Direct detection of the idler THz radiation generated by spontaneous parametric down-conversion |
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Journal Article |
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2019 |
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Opt. Lett. |
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Opt. Lett. |
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44 |
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5 |
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1198-1201 |
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HEB applications |
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We study parametric down-conversion (PDC) of optical laser radiation in the strongly frequency non-degenerate regime which is promising for the generation of quantum-correlated pairs of extremely different spectral ranges, the optical and the terahertz (THz) ones. The possibility to detect tenuous THz-frequency photon fluxes generated under low-gain spontaneous PDC is demonstrated using a hot electron bolometer. Then experimental dependences of the THz radiation power on the detection angle and on the pump intensity are analyzed. |
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0146-9592 |
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PMID:30821747 |
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1801 |
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Проходцов, А. И.; Голиков, А. Д.; Ан, П. П.; Ковалюк, В. В.; Гольцман, Г. Н. |
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Влияние покрытия из оксида кремния на эффективность фокусирующего решеточного элемента связи из нитрида кремния |
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Conference Article |
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2019 |
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Proc. IWQO |
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Proc. IWQO |
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201-203 |
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Keywords |
integrated optics, silicon nitride, focusing grating coupler |
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В работе экспериментально изучена зависимость эффективности фокусирующего решеточного элемента связи от периода и фактора заполнения до и после напыления верхнего слоя из оксида кремния. Полученные данные имеют практическое значение при создании перестраиваемых интегрально-оптических устройств на нитриде кремния. |
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Duplicated as 1188 |
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1282 |
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Елезов, М. С.; Щербатенко, М. Л.; Сыч, Д. В.; Гольцман, Г. Н. |
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Title |
Практические особенности работы оптоволоконного квантового приемника Кеннеди |
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Conference Article |
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2019 |
Publication |
Proc. IWQO |
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Proc. IWQO |
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303-305 |
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Kennedy quantum receiver, fiber, quantum optics, standard quantum limit, superconducting nanowire single-photon detector, coherent detection |
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Abstract |
Мы рассматриваем практические особенности работы квантового приемника на основе схемы Кеннеди, собранного из стандартных оптоволоконных элементов и сверхпроводникового детектора одиночных фотонов. Приемник разработан для различения двух фазовомодулированных когерентных состояний света на длине волны 1,5 микрона в непрерывном режиме с частотой модуляции 200 КГц и уровнем ошибок различения примерно в два раза ниже стандартного квантового предела. |
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Duplicated as 1288 |
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1283 |
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