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Fundamental Limits of Few-Layer NbSe2 Microbolometers at Terahertz Frequencies
Nano Letters. 2024. Vol. 24. No. 7. P. 2282–2288.
The rapid development of infrared spectroscopy, observational astronomy, and scanning near-field microscopy has been enabled by the emergence of sensitive mid- and far-infrared photodetectors. Superconducting hot-electron bolometers (HEBs), known for their exceptional signal-to-noise ratio and fast photoresponse, play a crucial role in these applications. While superconducting HEBs are traditionally crafted from sputtered thin films such as NbN, the potential of layered van der Waals (vdW) superconductors is untapped at THz frequencies. Here, we introduce superconducting HEBs made from few-layer NbSe2 microwires. By improving the interface between NbSe2 and metal leads, we overcome impedance mismatch with RF readout, enabling large responsivity THz detection (0.13 to 2.5 THz) with a minimal noise equivalent power of 7 pW/ Hz‾‾‾√Hz and nanosecond-range response time. Our work highlights NbSe2 as a promising platform for HEB technology and presents a reliable vdW assembly protocol for custom bolometer production.
Publication based on the results of:
Dmitriev A., Kornilov V., Batienkov R., Lecture Notes in Civil Engineering 2026 Vol. 886 P. 249–255
Numerous studies have provided compelling evidence that the probability distribution of avalanche sizes follows a power law, and that 1/f noise is present in the stochastic dynamics of landslides. We present a theoretical explanation of these phenomena within the framework of self-organized criticality theory, proposing a discrete-time model in the form of a sandpile cellular ...
Added: October 13, 2026
Dmitriev A., Shulman I., Lebedev A., Studies in Computational Intelligence 2026 Vol. 1265 P. 266–273
A discrete-time model is presented for the self-organization of the X/Twitter social network to the edge of a phase transition, characterized by avalanche-like propagation of information in the network. The model is based on the analogy between the critical dynamics of the X social network and sandpile cellular automata with Manna rule on the Chung-Lu ...
Added: October 13, 2026
Arutyunov K., Kharitonov I. A., Petrosyants K. O., JETP Letters 2026 Vol. 124 No. 6 P. 1–16
Superconducting properties of metallic micro- and nanowires can be entirely different from those of bulk superconductors. Of particular interest is the nonequilibrium current-induced state of a quasi-one-dimensional superconducting channel. The most interesting phenomenon here is the stepped I–V characteristic, explained by a process known as phase slip center activation. If the origin of such step-like ...
Added: October 13, 2026
Makarov D. M., Kalikin N., Fashchevsky K. A. et al., Electrochimica Acta 2026 Vol. 579 Article 150159
Machine learning (ML) has become a powerful tool for accelerating the development of carbon-based supercapacitors;
however, most published models assume that a single predictive framework can describe both conventional
porous carbons and hybrid carbon electrodes. Here, we test this assumption using a comprehensive
benchmark dataset and an extended literature-curated dataset enriched with synthesis- and electrolyte-related
descriptors. Three ML algorithms ...
Added: October 13, 2026
Махлуф М., Ozhegov R., Elezov M. et al., Фотоника 2026 Vol. 20 No. 6 P. 414–423
This paper compares the ranging precision of direct time-of-flight (dToF) and non-line-of-sight (NLOS) LiDAR architectures, both using a superconducting nanowire single-photon detector (SNSPD). Both systems operate at 1550 nm with a 50 ps pulsed laser and time-correlated single-photon counting (TCSPC). The dToF configuration achieved approximately 100 µm precision at 10 m, while the NLOS configuration achieved 500 µm precision for ...
Added: October 12, 2026
Singapore: Springer, 2026.
This volume presents the Proceedings of the 34th IUPAP Conference on Computational Physics (CCP2023), held in Kobe, Japan on August 4–8, 2023. It offers a collection of peer-reviewed articles that highlight recent developments in computational and simulation research across various areas of physics. Key topics include the use of data science, quantum computing, and machine ...
Added: October 12, 2026
Goncharov A., Chibisov A., Advanced Theory and Simulations 2023 Vol. 12 No. 13 Article 2200816
Designing stable quantum computers with the ability to correct errors responsibly requires a detailed understanding of the physical processes that underlie these devices. In this study, detailed quantum mechanical simulations of the atomic structure, charge distribution of electron density, and distribution and orientation of magnetic and quantum states as a function of applied external pressure ...
Added: October 11, 2026
Chibisov A., Gnidenko A., Chibisova M. et al., FlatChem 2023 Vol. 41 Article 100533
Manufacturing precise quantum computers with small errors in quantum operations, long coherence times, and low power consumption is the most important challenge in modern nanoelectronics. To understand the operating modes of such calculators in detail, both the optimal arrangement of the qubit system within the structure and changes in its magnetic properties must be comprehensively ...
Added: October 11, 2026
Frolov N. Y., Klokov A. Y., Sharkov A. I. et al., Applied Physics Letters 2026 Vol. 128 P. 092201-1–092201-5
Understanding the properties of two-dimensional material interfaces with the substrate is necessary for device applications. Surface acoustic wave propagation through a layered material flake on a substrate could provide unique information on the transverse rigidity of the flake-to-substrate interaction. Ultrasonic waves were generated by a focused femtosecond laser pulse at the surface of a model ...
Added: September 26, 2026
Shilov A. L., Elesin L., Kravtsov M. et al., Nature Communications 2026 Vol. 17 No. 1 Article 9734
Identifying the microscopic processes limiting conductivity is essential for understanding correlated quantum materials. In twisted bilayer graphene, metallic resistivity follows ρ ~ Tα with widely varying α, fueling competing interpretations from phonon-limited transport and umklapp scattering to strange metallicity and heavy-fermion renormalization. Here, we use terahertz excitation to selectively heat electrons while keeping the lattice cold, separating ...
Added: September 20, 2026
Paukov M. I., Starchenko V. V., Melnikov A. et al., Materials Today Chemistry 2024 No. 36 Article 101886
Added: July 24, 2025
Shurakov A., Lvov A., Belikov I. et al., , in: 2024 IEEE 9th All-Russian Microwave Conference (RMC).: IEEE, 2024. P. 196–199.
Terahertz frequency range attracts the attention of the scientific community in different fields, including data transfer, imaging, and spectral analysis. In the context of astronomical instrumentation, the utilization of the 7–14 THz spectral band opens up opportunities for advanced studies of exoplanet formation and the energy balance in the interstellar medium from the Earth surface. ...
Added: January 24, 2025
Bondareva P., Shein K., Lyubchak A. N. et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2024 Vol. 17 No. 3.2 P. 46–51
Graphene, due to its record low electron heat capacity and weak electron-phonon coupling at low temperatures, is considered as a promising material for creating terahertz hot electron bolometers. The main challenge to the development of such devices is the weak dependence of graphene resistance on temperature. Here we demonstrate measurement system based on Johnson noise ...
Added: November 5, 2024
Prikhodko A., Khakimov A., Mokrov E. et al., Lecture Notes in Computer Science 2024 Vol. 14123 P. 423–434
The future 6G cellular systems are expected to utilize the lower part of the terahertz frequency band, 100–300 GHz. As a result of high path losses, the coverage of such systems will be limited to a few tens of meters making them suitable for indoor environments. As compared to outdoor deployments, indoor usage of THz systems ...
Added: September 25, 2024
Khakimov A., Prikhodko A., Mokrov E. et al., Lecture Notes in Computer Science 2024 Vol. 14542 P. 181–193
Blockage detection is a critical functionality for the air interface in modern 5G and future 6G systems operating in millimeter wave (mmWave, 30–300 GHz) and terahertz (0.3–3 THz) frequency bands. In operational systems, blockage has to be detected prior to its occurrence to allow for time to take some actions to avoid the loss of ...
Added: September 25, 2024
Jiang X., Tan J., Liu D. et al., The Journal of Physical Chemistry Letters 2024 Vol. 15 No. 10 P. 2867–2875
The rapid recombination of photogenerated carriers heavily restrict the photocatalytic efficiency. Here, we propose a new strategy to improve catalytic efficiency based on ferroelectric van der Waals heterostructure (CuBiP2Se6/C2N). Combining density functional theory and nonadiabatic molecular dynamics (NAMD) method, we have systematically analyzed the ground state properties and carrier dynamics images in CuBiP2Se6/C2N heterostructure. Our ...
Added: March 5, 2024
Duleba A., Pugachev M., Mark Blumenau et al., Micromachines 2024 Vol. 15 No. 1 Article 94
Most 2D materials are unstable under ambient conditions. Assembly of van der Waals heterostructures in the inert atmosphere of the glove box with ex situ lithography partially solves the problem of device fabrication out of unstable materials. In our paper, we demonstrate an approach to the next-generation inert-atmosphere (nitrogen, <20 ppm oxygen content) fabrication setup, ...
Added: February 15, 2024
Gayduchenko I., M.: Our Style, 2023.
The abstracts of reports of the 5th International Conference “Terahertz and Microwave Radiation: Generation, Detec- tion and Applications” (TERA-2023). TERA-2023 conference is devoted to the discussion of fundamental and applied problems related to the generation and detection of terahertz and microwave radiation as well as its interaction with matter. The purpose of the conference is ...
Added: February 12, 2024
P. I. Bondareva, K. V. Shein, A. N. Lyubchak et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2023 Vol. 16 No. 3.1 P. 128–132
In this paper we investigate a novel approach to inventing graphene-based sub-ter- ahertz bolometers using noise thermometry. Graphene is a unique material for detecting radi- ation in the sub-terahertz (0.1–1 THz) and terahertz (1–10 THz) ranges due to its record low electron heat capacity and weak electron-phonon coupling. This results in sufficient heating of graphene ...
Added: February 5, 2024
Shurakov A., Belikov I., Prikhodko A. et al., Applied Sciences (Switzerland) 2023 Vol. 13 No. 10 Article 5892
Terahertz photonic integrated circuits are becoming popular in ultrafast on-chip signal generation and processing. They outperform assemblies of electronic devices making use of metallic waveguides in term of both fabrication complexity and system losses. In this study, we report on a nearly all-dielectric hot electron bolometer mixer compatible with the technology of integrated Si photonic ...
Added: May 11, 2023
E. Khorov, A. Krasilov, M. Susloparov et al., IEEE Communications Surveys and Tutorials 2023 Vol. 25 No. 4 P. 2862–2891
Emerging wireless systems target to provide multi-Gbps data rates for each user, which can be achieved by utilizing ultra-wide channels available at mmWave, terahertz, and lightwave frequencies. In contrast to the traditional spectrum below 6 GHz, these high-frequency bands raise many issues, complicating their usage. For example, because of high signal attenuation and blockage by ...
Added: December 23, 2022
Pugachev M., Duleba A., Arslan A. Galiullin et al., Micromachines 2021 Vol. 12 No. 8 Article 850
The fast and precise fabrication of micro-devices based on single flakes of novel 2D materials and stacked heterostructures is vital for exploration of novel functionalities. In this paper, we demonstrate a fast high-resolution contact mask lithography through a simple upgrade of metallographic optical microscope. Suggested kit for the micromask lithography is compact and easily compatible ...
Added: November 14, 2022
Stepanov N., Moltchanov D., Begishev V. et al., IEEE Transactions on Vehicular Technology 2022 Vol. 71 No. 1 P. 725–738
Terahertz (THz, 0.3!!-!!3 THz) wireless access is nowadays considered as a major enabling technology for sixth generation (6G) cellular systems. To compensate for high propagation losses, these systems will utilize antenna arrays with extremely directional beams. The performance of such systems will thus be heavily affected by micromobility such as shakes and rotations of user ...
Added: October 27, 2022
Vinnichenko M. Y., Makhov I., Ustimenko R. V. et al., , in: 2022 47th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz).: IEEE, 2022. P. 1–2.
Added: October 25, 2022