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Hot-spot relaxation time current dependence in niobium nitride waveguide-integrated superconducting nanowire single-photon detectors
Optics Express. 2017. Vol. 25. No. 8. P. 8739-8750.
Ferrari S., Kovalyuk V., Hartmann W., Vetter A., Kahl O., Lee C., Korneev A., Rockstuhl C., G.Gol’tsman, Pernice W.
We investigate how the bias current affects the hot-spot relaxation dynamics in niobium nitride. We use for this purpose a near-infrared pump-probe technique on a waveguide-integrated superconducting nanowire single-photon detector driven in the two-photon regime. We observe a strong increase in the picosecond relaxation time for higher bias currents. A minimum relaxation time of (22 ± 1) ps is obtained when applying a bias current of 50% of the switching current at 1.7 K bath temperature. We also propose a practical approach to accurately estimate the photon detection regimes based on the reconstruction of the measured detector tomography at different bias currents and for different illumination conditions.
Нижегородский государственный университет им. Н.И. Лобачевского, 2019
Semiconductor nanostructures: electronic, optical properties, formation methods ...
Added: October 28, 2019
Kovalyuk V., Hartmann W., Kahl O. et al., Optics Express 2013 Vol. 21 No. 19 P. 22683-22692
We investigate the absorption properties of U-shaped niobium nitride (NbN) nanowires atop nanophotonic circuits. Nanowires as narrow as 20nm are realized in direct contact with Si3N4 waveguides and their absorption properties are extracted through balanced measurements. We perform a full characterization of the absorption coefficient in dependence of length, width and separation of the fabricated ...
Added: March 13, 2014
Нижегородский государственный университет им. Н.И. Лобачевского, 2020
Труды ХХIV Международного симпозиума «Нанофизика и наноэлектроника», 10-13 марта 2020, Нижний Новгород, в двух томах, т1 и т.2, ...
Added: November 9, 2020
Kahl O., Ferrari S., Kovalyuk V. et al., Optica 2017 Vol. 4 No. 5 P. 557-562
The detection of individual photons by superconducting nanowire single-photon detectors is an inherently binary mechanism, revealing either their absence or presence while concealing their spectral information. For multicolor imaging techniques, such as single-photon spectroscopy, fluorescence resonance energy transfer microscopy, and fluorescence correlation spectroscopy, wavelength discrimination is essential and mandates spectral separation prior to detection. Here, ...
Added: October 18, 2017
Тронев А. В., Парфенов М. В., Соломонов Н. А. et al., Письма в Журнал технической физики 2020 Т. 46 № 17 С. 51-54
Показано, что лазерная модификация нанометровой титановой пленки может быть использована для точно-го управления уровнем потерь в оптических волноводах на подложках ниобата лития. Теоретические оценкиизменения погонных потерь на уровне 0.95 dB/mm подтверждены экспериментами по локальной лазерноймодификации с использованием излучения на длине волны 976 nm с пороговой интенсивностью 1 kW/mm2.Предложенная методика может быть эффективно использованадля прецизионной подгонки ...
Added: December 5, 2020
Chulkova G., Семенов А. В., Дивочий А. В. et al., Журнал радиоэлектроники 2011 № 12 С. 7
Рассмотрена возможность применения сверхпроводникового однофотонного детектора, разрешающего число фотонов, в качестве датчика приёмных модулей телекоммуникационных линий. Показано, что для достижения доли ошибочных битов на уровне 10-11 достаточно на два порядка меньшей мощности в оптическом импульсе, чем при использовании существующих приёмных модулей. ...
Added: March 16, 2015
Zhukov A., Institute of Physics Publishing (IOP), 2021
8th International School and Conference "Saint-Petersburg OPEN 2021" on Optoelectronics, Photonics, Engineering and Nanostructures was held on May 25 - 28, 2021. The Organizers of the conference are the National Research University "Higher School of Economics" and Alferov Saint Petersburg National Research Academic University of the Russian Academy of Sciences. More than 300 participants from ...
Added: October 26, 2022
Korneeva Y., Sidorova M., Semenov A. et al., IEEE Transactions on Applied Superconductivity 2016 Vol. 26 No. 3 P. 1-4
We report an experimental investigation of the hot spot evolution in superconducting single photons detectors (SSPDs) made of disordered superconducting materials with different diffusivity and energy down-conversion time: 33-nmthickNbN and 23-nm-thick NbC films. We have demonstrated that in NbC film only 405 nm photons produce sufficiently largehot-spot to trigger a single-photon response. The dependence of ...
Added: October 9, 2015
Cosacchi M., Wiercinski J., Seidelmann T. et al., Physical Review Research 2020 Vol. 2 Article 033489
The on-demand preparation of higher-order Fock states is of fundamental importance in quantum information sciences. We propose and compare different protocols to generate higher-order Fock states in solid state quantum-dot–cavity systems. The protocols make use of a series of laser pulses to excite the quantum dot exciton and off-resonant pulses to control the detuning between ...
Added: February 24, 2022
Elezov M., Roman Ozhegov, Gregory Goltsman et al., Optics Express 2019 Vol. 27 No. 21 P. 30979-30988
We present an active anti-latching system for superconducting nanowire single-photon detectors. We experimentally test it against a bright-light attack, previously used to compromise security of quantum key distribution. Although our system detects continuous blinding, the detector is shown to be partially blindable and controllable by specially tailored sequences of bright pulses. Improvements to the countermeasure ...
Added: October 23, 2019
Vetter A., Ferrari S., Rath P. et al., Nano Letters 2016 Vol. 16 No. 11 P. 7085-7092
Ultrafast single-photon detectors with high efficiency are of utmost importance for many applications in the context of integrated quantum photonic circuits. Detectors based on superconductor nanowires attached to optical waveguides are particularly appealing for this purpose. However, their speed is limited because the required high absorption efficiency necessitates long nanowires deposited on top of the ...
Added: February 2, 2017
Chulkova G., Korneev A., Кардакова А. И. et al., Современные проблемы науки и образования 2012 № 6 С. 594
Проведено моделирование зависимости квантовой эффективности сверхпроводниковогооднофотонного детектора от энергии фотона. ...
Added: March 16, 2015
Balygin K. A., Bozhko S. I., Ionov A.M. et al., Moscow University Physics Bulletin 2020 Vol. 75 No. 3 P. 68-73
A measuring complex for recording events by single-photon superconducting detectors based on NbN structures is presented; low-noise high-frequency HEMT transistors are used as cryogenic amplifiers in it. ...
Added: December 6, 2020
Chulkova G., Korneev A., Goltsman G. et al., М. : МПГУ, 2014
Монография посвящена актуальной проблеме эффекта однофотонного детектирования света видимого и ИК диапазонов структурами субмикронных размеров, изготовленными из тонких сверхпроводящих плёнок в условии протекания через них тока близкого к критическому току распаривания. ...
Added: February 25, 2016
M. Polyakova, Semenov A. V., Kovalyuk V. et al., IEEE Transactions on Applied Superconductivity 2019 Vol. 29 No. 5 P. 1-5
We present a simple quantum detector tomography
protocol, which allows, without ambiguities, to measure the twospot
detection efficiency and extract the hot-spot interaction length
of SNSPDs with unity intrinsic detection efficiency. We identify a
significant parasitic contribution to the measured two-spot efficiency,
related to an effect of the bias circuit, and find a way to rule
out this contribution during data ...
Added: October 23, 2019
Shcherbatenko M., Elezov M., Manova N. et al., Applied Physics Letters 2021 Vol. 118 Article 181103
High sensitivity imaging at the level of single photons is an invaluable tool in many areas, ranging from microscopy to astronomy. However, development of single-photon sensitive detectors with high spatial resolution is very non-trivial. Here we employ the singlepixel imaging approach and demonstrate a proof-of-principle single-pixel single-photon imaging setup. We overcome the problem of low ...
Added: May 6, 2021
Beliaev L., Takayama O., Melentiev P. N. et al., OPTO-ELECTRONIC ADVANCES 2021 Vol. 4 No. 8 Article 210031
Photoluminescence including fluorescence plays a great role in a wide variety of applications from biomedical sensing and imaging to optoelectronics. Therefore, the enhancement and control of photoluminescence has immense impact both on fundamental scientific research and aforementioned applications. Among various nanophotonic schemes and nanostructures to enhance the photoluminescence, we focus on a certain type of ...
Added: October 16, 2021
Трифонов А. В., Аверьев Н. В., Чараев И. А. et al., Труды МФТИ, Россия, Москва 2014 Т. 6 № 1 С. 20
Работа посвящена сравнению с экспериментом модели термически активированных одиночных вихрей, описывающей темновой счет сверхпроводникового однофотонно- го детектора. Получено, что модель достаточно хорошо описывает зависимость числа темновых отсчетов в единицу времени от тока смещения, если последний достаточно близок к критическому току (𝐼𝑏 ≥ 0.9𝐼𝑐). ...
Added: March 16, 2015
Ozhegov R., Горшков К. Н., Окунев О. В. et al., М. : МПГУ, 2014
Монография посвящена актуальной проблеме современной радиофизике: построение радиоизображений в терагерцовом диапазоне частот. Неоспоримые преимущества использования терагерцовой системыпостроения радиоизображений во многих областях от медицины и системы безопасности до навигации в условиях плохой видимости делает эту работу особенно актуальной. Продемонстрированы супергетгродинные тепловизеры терагерцового диапазона частот двух типов. В первом использован супергетеродинный приемник на основе сместителя на эффекте ...
Added: February 26, 2016
Korneeva Y., Mikhailov M., Pershin Y. et al., Superconductor Science and Technology 2014 Vol. 27 No. 9 P. 095012
We fabricated and characterized nanowire superconducting single-photon detectors made of 4 nm thick amorphous Mo x Si1−x films. At 1.7 K the best devices exhibit a detection efficiency (DE) up to 18% at 1.2 <img /> wavelength of unpolarized light, a characteristic response time of about 6 ns and timing jitter of 120 ps. The ...
Added: March 31, 2015
Chulkova G., Korneev A., Семенов А. В. et al., Журнал радиоэлектроники 2011 № 11
В статье представлена зависимость квантовой эффективности от энергии фотона в рамках модели горячего пятна. Диффузия квазичастиц происходит в основном перпендикулярно направлению тока в областях с максимальной плотностью тока. Максимальная квантовая эффективность детектора пропорциональна вероятности поглощения фотона. Несмотря на квантовый характер работы сверхпроводникового однофотонного детектора, он не имеет четко выраженной красной границы. Изменяя режим работы в ...
Added: March 16, 2015
Lazarev M., Infoscience EPFL 2019 P. 1-163
We have focused on the ability to tune the aluminum (Al) content of the AlGaAs alloy along the growth direction in inverted pyramids (by MOVPE), thus tailoring the potential along a QWR nanostructure. Three parabolic-potential QDs (PQDs) of different potential gradients have thus been realized. The parabolic profiles were changed systematically by fixing the minimum ...
Added: October 29, 2021
Antipov A., Seleznev V., Vakhtomin Y. et al., IOP Conference Series: Materials Science and Engineering (MSE) 2020 Vol. 781 No. 1 P. 012011-1-012011-5
Spectral characteristics of WSi and NbN superconducting single-photon detectors with different surface resistance and width of nanowire strips have been investigated in the wavelength range of 1.3-2.5 µm. WSi structures with narrower strips demonstrated better performance for detection of single photons in longer wavelength range. The difference in normalized photon count rate for such structures ...
Added: December 10, 2020
Budkov Y., Kolesnikov A. L., Polymer Science - Series C 2018 Vol. 60 No. Supplement 1 P. 148-159
Theoretical models of the conformational behavior of flexible polymer chains in mixed solvents enunciated in the world literature during the last decade are critically reviewed. Models describing different mechanisms of coil-to-globule transitions in a good solvent induced by cosolvent addition are highlighted. Special attention is given to the analysis of theoretical approaches to describing the ...
Added: November 30, 2018