Гольцман Григорий Наумович
Московский институт электроники и математики им. А.Н. Тихонова
Профессиональные интересы
Должности
- Заведующий кафедрой — Московский институт электроники и математики им. А.Н. Тихонова, Базовая кафедра квантовой оптики и телекоммуникаций ЗАО «Сконтел»
- Профессор — Московский институт электроники и математики им. А.Н. Тихонова, Базовая кафедра квантовой оптики и телекоммуникаций ЗАО «Сконтел»
Био
- · Начал работать в НИУ ВШЭ в 2013 году.
- · Научно-педагогический стаж: 55 лет.
Образование
- 1988 · Ученое звание: Профессор
- 1985 · Доктор физико-математических наук
- 1968 · Специалитет: Московский государственный педагогический институт им. В.И. Ленина, специальность «Физика», квалификация «Учитель физики и звание учителя средней школы»
Опыт работы
- · Общий стаж - 54 года
- · Научно-педагогический стаж - 51 год
- · Преподавательский стаж - 44 года
Награды и поощрения
- · Медаль "В память 850-летия Москвы" (февраль 1997)
- · Надбавка за публикацию в журнале из Списка А (и приравненном к нему научном издании) (2025–2026, 2024–2025)
- · Надбавка за публикацию в международном рецензируемом научном издании (2022–2023, 2021–2022, 2020–2022, 2018–2020)
- · Надбавка за статью в зарубежном рецензируемом журнале (2014–2016)
- · Надбавка за статью в зарубежном рецензируемом научном издании (2016–2018)
- · Лучший преподаватель — 2014
Гранты и проекты
- — · на соискание учёной степени кандидата наук
Конференции (2)
Показать все
- · 2022: Школа-конференция с международным участием по оптоэлектронике, фотонике и нанобиоструктурам Saint Petersburg OPEN (Санкт-Петербург). Доклад: A mmWave Rod Antenna Array Compatible with a PCB Prototyping Technology
- · 2022: Школа-конференция с международным участием по оптоэлектронике, фотонике и нанобиоструктурам Saint Petersburg OPEN (Санкт-Петербург). Доклад: Thermo-optical effect in a Mach-Zehnder interferometer on a silicon nitride platform for quantum photonic applications
Идентификаторы исследователя
- ORCID:
0000-0002-1960-9161 - ResearcherID:
A-4189-2014 - SPIN РИНЦ:
4622-7870 - Google Scholar: https://scholar.google.ru/citations?user=qljeUfEAAAAJ&hl=ru
- Scopus AuthorID:
7006771637
Публикации (253)
Attojoule energy resolution of direct detector based on hot electron bolometer
2016 · ARTICLE · en
We characterize superconducting antenna-coupled NbN hot-electron bolometer (HEB) for direct detection of THz radiation operating at a temperature of 9.0 K. At signal frequency of 2.5 THz, the measured value of the optical noise equivalent power is 2.0×10-13 W-Hz-0.5. The estimated value of the energy resolution is about 1.5 aJ. This value was confirmed in the experiment with pulsed 1.55-μm laser employed as a radiation source. The directly measured detector energy resolution is 2 aJ. The obtained risetime of pulses from the detector is 130 ps. This value was determined by the properties of the RF line. These characteristics make our detector a device-of-choice for a number of practical applications associated with detection of short THz pulses.
Travelling-wave single-photon detectors integrated with diamond photonic circuits: Operation at visible and telecom wavelengths with a timing jitter down to 23 ps
2016 · CHAPTER · en
We report on the design, fabrication and measurement of travelling-wave superconducting nanowire single-photon detectors (SNSPDs) integrated with polycrystalline diamond photonic circuits. We analyze their performance both in the near-infrared wavelength regime around 1600 nm and at 765 nm. Near-IR detection is important for compatibility with the telecommunication infrastructure, while operation in the visible wavelength range is relevant for compatibility with the emission line of silicon vacancy centers in diamond which can be used as efficient single-photon sources. Our detectors feature high critical currents (up to 31 μA) and high performance in terms of efficiency (up to 74% at 765 nm), noise-equivalent power (down to 4.4×10-19 W/Hz1/2 at 765 nm) and timing jitter (down to 23 ps).
Coherent Dynamics and Decoherence in a Superconducting Weak Link
2016 · ARTICLE · en
We demonstrate coherent dynamics of quantized magnetic fluxes in a superconducting loop with a weak link, a nanobridge patterned from the same thin NbN film as the loop. The bridge is a short, rounded shape constriction, close to 10 nm long and 20–30 nm wide, having minimal width at its center. It superposes neighboring fluxoid states of the loop. Quantum state control and coherent oscillations in the driven time evolution of the tunnel-junctionless system are achieved. Decoherence and energy relaxation in the system are studied using a combination of microwave spectroscopy and direct time-domain techniques. The effective flux noise behavior suggests inductance fluctuations as a possible cause of the decoherence.
Potential of a Superconducting Photon Counter for Heterodyne Detection at Telecommunication Wavelength
2016 · ARTICLE · en
Here, we report on the successful operation of a NbN thin film superconducting nanowire single-photon detector (SNSPD) in a coherent mode (as a mixer) at the telecommunication wavelength of 1550 nm. Providing the local oscillator power of the order of a few picowatts, we were practically able to reach the quantum noise limited sensitivity. The intermediate frequency gain bandwidth (also referred to as response or conversion bandwidth) was limited by the spectral band of a single-photon response pulse of the detector, which is proportional to the detector size. We observed a gain bandwidth of 65 MHz and 140 MHz for 7 × 7 µm2 and 3 × 3 µm2 devices, respectively. A tiny amount of the required local oscillator power and wide gain and noise bandwidths, along with unnecessary low noise amplification, make this technology prominent for various applications, with the possibility for future development of a photon counting heterodyne-born large-scale array.
Slow Electron - Phonon Cooling in Superconducting Diamond Films
2016 · ARTICLE · en
We have measured the electron-phonon energyrelaxation time, 𝝉𝒆𝒑𝒉, in superconducting boron-doped diamond films grown on silicon substrate by chemical vapour deposition. The observed electron-phonon cooling times vary from 160 ns at 2.70 K to 410 ns at 1.8 K following a 𝑻!𝟐-dependence. The data are consistent with the values of 𝝉𝒆𝒑𝒉 previously reported for single-crystal boron-doped diamond films epitaxially grown on diamond substrate. Such a noticeable slow electron-phonon relaxation in boron-doped diamond, in combination with a high normal-state resistivity confirms a potential of superconducting diamond for ultrasensitive superconducting bolometers.
Cavity-Enhanced and Ultrafast Superconducting Single-Photon Detectors
2016 · ARTICLE · en
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 waveguide. This enhances the kinetic inductance and makes the detectors slow. Here, we solve this problem by aligning the nanowire, contrary to usual choice, perpendicular to the waveguide to realize devices with a length below 1 μm. By integrating the nanowire into a photonic crystal cavity, we recover high absorption efficiency, thus enhancing the detection efficiency by more than an order of magnitude. Our cavity enhanced superconducting nanowire detectors are fully embedded in silicon nanophotonic circuits and efficiently detect single photons at telecom wavelengths. The detectors possess subnanosecond decay (∼120 ps) and recovery times (∼510 ps) and thus show potential for GHz count rates at low timing jitter (∼32 ps). The small absorption volume allows efficient threshold multiphoton detection.
Probing the stability of HEB mixers with microwave injection
2015 · ARTICLE · en
Using a microwave probe as a tool, we have performed experiments aimed at understanding the origin of the output-power fluctuations in hot-electron-bolometer (HEB) mixers. We use a probe frequency of 1.5 GHz. The microwave probe picks up impedance changes of the HEB, which are examined upon demodulation of the reflected wave outside the cryostat. This study shows that the HEB mixer operates in two different regimes under a terahertz pump. At a low pumping level, strong pulse modulation is observed, as the device switches between the superconducting state and the normal state at a rate of a few megahertz. When pumped much harder, to approximate the low-noise mixer operating point, residual modulation can still be observed, showing that the HEB mixer is intrinsically unstable even in the resistive state. Based on these observations, we introduced a low-frequency termination to the HEB mixer. By terminating the device in a 50-Ω resistor in the megahertz frequency range, we have been able to improve the output-power Allan time of our HEB receiver by a factor of four to about 10 s for a detection bandwidth of 15 MHz, with a corresponding gain fluctuation of about 0.035%.
Fast and Sensitive Terahertz Direct Detector Based on Superconducting Antenna-Coupled Hot Electron Bolometer
2015 · ARTICLE · en
We characterize superconducting antenna-coupled hot-electron bolometers for direct detection of terahertz radiation operating at a temperature of 9.0 K. The estimated value of responsivity obtained from lumped-element theory is strongly different from the measured one. A numerical calculation of the detector responsivity is developed, using the Euler method, applied to the system of heat balance equations written in recurrent form. This distributed element model takes into account the effect of nonuniform heating of the detector along its length and provides results that are in better agreement with the experiment. At a signal frequency of 2.5 THz, the measured value of the optical detector noise equivalent power is 2.0 × 10-13 W · Hz-0.5. The value of the bolometer time constant is 35 ps. The corresponding energy resolution is about 3 aJ. This detector has a sensitivity similar to that of the state-of-the-art sub-millimeter detectors operating at accessible cryogenic temperatures, but with a response time several orders of magnitude shorter.
Characterization of MoSi Superconducting Single-Photon Detectors in the Magnetic Field
2015 · ARTICLE · en
We investigate the response mechanism of nanowire superconducting single-photon detectors (SSPDs) made of amorphous MoxSi1-x. We study the dependence of photon count and dark count rates on bias current in magnetic fields up to 113 mT at 1.7 K temperature. The observed behavior of photon counts is similar to the one recently observed in NbN SSPDs. Our results show that the detecting mechanism of relatively high-energy photons does not involve the vortex penetration from the edges of the film, and on the contrary, the detecting mechanism of low-energy photons probably involves the vortex penetration from the film edges.
Three temperature regimes in superconducting photon detectors: Quantum, thermal and multiple phase-slips as generators of dark counts
2015 · ARTICLE · en
We perform measurements of the switching current distributions of three w nm wide, 4 nm thick NbN superconducting strips which are used for single-photon detectors. These strips are much wider than the diameter of the vortex cores, so they are classified as quasi-two-dimensional (quasi-2D). We discover evidence of macroscopic quantum tunneling by observing the saturation of the standard deviation of the switching distributions at temperatures around 2K. We analyze our results using the Kurkijärvi-Garg model and find that the escape temperature also saturates at low temperatures, confirming that at sufficiently low temperatures, macroscopic quantum tunneling is possible in quasi-2D strips and can contribute to dark counts observed in single photon detectors. At the highest temperatures the system enters a multiple phase-slip regime. In this range single phase-slips are unable to produce dark counts and the fluctuations in the switching current are reduced.
Курсы (3)
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Технологические основы квантовых вычислений и квантовых коммуникаций (семинар наставника) · 5 раза
2025/2026, 2024/2025, 2023/2024, 2022/2023, 2021/2022 · семинар наставника · рус
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Устройства для квантовых вычислений и коммуникации · 3 раза
2025/2026, 2023/2024, 2022/2023 · Бакалавриат · рус
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Квантовые компьютеры и квантовые коммуникации
2021/2022 · Магистратура · рус