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Open-Type SPP Waveguide with Ultrahigh Bandwidth up to 3.5 THz
ACS Photonics. 2019. Vol. 6. P. 1425–1433.
Melentiev P., Kalmykov A., Balykin V.
Due to losses in metals, the propagation length of the surface plasmon-polariton (SPP) waves on metal surfaces is
small. This severely limits development of numerous applications of the SPP optics: in the near-infrared spectral region propagation length of SPP waves is no longer than 200 μm as for plane SPP waves and for all types of SPP waveguides. In this work, we show that the focusing of SPPs allows for the first time realizing open-type waveguide for SPP waves characterized by long distance of SPP effective propagation length up to 1 mm at a wavelength of 780 nm. We show that focused SPP waves in such a waveguide can be effectively excited by a 16 fs laser as well as be amplitude modulated within a bandwidth about 3.5 THz. The fast dynamics of the focused SPP waves is limited by the SPP group velocity dispersion. The large effective propagation length of the SPPs and its ultrahigh bandwidth open up new possibilities for using focused SPPs in different areas of plasmonics and photonics.
Zadkov V., Plasmonics 2026 Vol. 21 P. 1503–1512
Plasmonic nanostructures typically exhibit shifts in their resonant wavelength in response to changes in the refractive index of the surrounding medium. This limits their applications in scenarios requiring stable optical resonances. Here we present a metallic-dielectric hybrid metasurface that exhibits stable multi-wavelength resonance even if the refractive index of its surrounding varies. To quantitatively evaluate the stability of ...
Added: April 22, 2026
Qin X., Deng Y., Shchur L. et al., / Series arXiv "math". 2026. No. 2603.02962.
We perform a Monte Carlo analysis of the Ising model on many three-dimensional lattices. By means of finite-size scaling we obtain the critical points and determine the scaling dimensions. As expected, the critical exponents agree with the three-dimensional Ising universality class for all models. The irrelevant field, as revealed by the correction-to-scaling amplitudes, appears to ...
Added: April 20, 2026
Pilé I., Deng Y., Shchur L., / Series arXiv "math". 2026. No. 2604.10254.
We investigate the spatial overlap of successive spin configurations in Markov chain Monte Carlo simulations using the local Metropolis algorithm and the Svendsen-Wang and Wolff cluster algorithms. We examine the dynamics of these algorithms for two models in different universality classes: the Ising model and the Potts model with three components. The overlap of two ...
Added: April 20, 2026
Kalikin N., Брандышев П. Е., Budkov Y., Journal of Chemical Physics 2026 Vol. 164 Article 154904
This study presents a mean-field theory for zwitterionic polymer solutions confined within attractive slit-like nanopores. Building upon our prior model for self-coacervation [Budkov et al., Soft Matter 19, 3281–3289 (2023)], we demonstrate that strong electrostatic dipole–dipole correlations between monomeric units, coupled with attraction to pore walls, can induce capillary-driven liquid–liquid phase separation inside the pore—a ...
Added: April 18, 2026
Moiseev E., Масютин Д. А., Мельниченко И. А. et al., Optics and Laser Technology 2025 Vol. 201 No. 115289 P. 1–5
Lasing at a wavelength near 255 nm is demonstrated in AlGaN whispering gallery mode microlasers with radii ranging from 1 to 3 µm fabricated on sapphire substrates, representing one of the shortest-wavelength realizations of microdisk lasers on this technologically relevant platform. The minimum threshold energy was 8.8 pJ (power density ≈ 280 kW/cm2) for a microlaser with a ...
Added: April 18, 2026
Шугабаев Т., Мельниченко И. А., Кузнецов А. et al., Nanoscale Horizons 2026 P. 1–8
The combination of plasmonic systems and the high optical gain of InGaN is a promising approach for the fabrication of nanolasers and other nanoscale light sources. Here, we demonstrate, for the first time, the use of MBE-grown GaN nanowires with embedded InGaN quantum wells as the key components for plasmonic nanolasers. The utilization of quantum ...
Added: April 9, 2026
Babichev A., Makhov I., Kryzhanovskaya N. et al., IEEE Journal on Selected Topics in Quantum Electronics 2026 Vol. 32 No. 6 Article 1700208
Micropillar cavity lasers demonstrate operation up to 255 K. At this temperature, the lasing threshold and Q-factor, extracted at lasing threshold for a 4 μm diameter pillar are about 2 mW and 16800. For pillar lasers, the concept of which is based on an optical aperture, continuous-wave lasing is realized at room temperature (300 K). ...
Added: March 23, 2026
Карцев А. И., Сафронов А. А., Радиотехника и электроника 2024 Т. 69 № 10 С. 989–995
The first-principle modeling of two different quasi-two-dimensional phases based on the volume phases Cr2Te3 and CrTe3 is carried out. Structural relaxation of the obtained 2D compounds and their volumetric prototypes was performed within the framework of the density functional method and the projection plane wave method. Magnetic anisotropy in various crystallographic planes of quasi-two-dimensional structures and corresponding ...
Added: March 17, 2026
Chowde Gowda C., Alexey Kartsev, Tiwari N. et al., Small 2024 Vol. 20 No. 47 Article 2405197
A vast majority of electrical devices have integrated magnetic units, which generate constant magnetic fields with noticeable vibrations. The majority of existing nanogenerators acquire energy through friction/mechanical forces and most of these instances overlook acoustic vibrations and magnetic fields. Magnetic two-dimensional (2D) tellurides present a wide range of possibilities for devising a potential flexible energy ...
Added: March 16, 2026
Карцев А. И., Physics of Metals and Metallography 2025 Vol. 125 No. 14 P. 1935–1939
The problem of the maximum oscillation frequency of composite bimetallic microactuators excited by thermal pulses has been theoretically investigated. Both traditional bimetallic composites made of metals and alloys with different coefficients of thermal expansion and composites in which one of the layers is made of a mechanically pre-stressed shape memory alloy (SMA) and the other ...
Added: March 16, 2026
Kushchuk L. I., Veretimus D. K., Lega P. V. et al., Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques 2025 Vol. 18 No. 4 P. 859–863
The densities of electronic states in quasi-two-dimensional vanadium nitrides have been studied using density functional theory and the method of the crystal orbital Hamilton population. The contribution of various orbital pairs and their influence on the stability of the magnetic subsystem of these compounds have been analyzed using the crystal orbital Hamilton population (COHP) algorithm. ...
Added: March 16, 2026
Kushchuk L. I., Alexey Ivanovich Kartsev, Nanoscale 2025 Vol. 17 No. 16 P. 10292–10302
We have systematically examined various parameters of t- (tetragonal) and h- (hexagonal) lattices of transition metal nitride (TMN) monolayers through first-principles calculations, emphasising their structural and magnetic properties. Our study reveals that all TMN monolayers exhibit a preference for a magnetic ground state. Employing the Heisenberg model, we extract exchange interaction and magnetic anisotropy parameters. ...
Added: March 16, 2026
Карцев А. И., Сафронов А. А., Махов М. И., Журнал радиоэлектроники 2024 № 3
In this paper, we find an analytical expression for the energy spectrum of a particle in a one-dimensional potential well with infinitely high walls. One of the walls with the coordinate x = 0 is motionless, the other wall, which has the coordinate x = a at the initial moment of time, moves at a constant speed. The results obtained can ...
Added: March 16, 2026
Лебедев И. С., Кудрявцев А. В., Карцев А. И. et al., Журнал радиоэлектроники 2025 № 11 Статья 30
n this paper, the effect of doping on the electronic and magnetic properties of a monolayer compound Cr(ClxF1-x)3 is studied based on a first-principles calculation. The densities of electronic states, the values of the band gap, the constants of the crystal lattice and the difference in total energies for ferromagnetic and antiferromagnetic configurations at different mutual ...
Added: March 16, 2026
Mitra D., Campos de Oliveira C., Alexey Kartsev et al., Nanoscale 2026 No. 10 P. 5482–5495
Atomically-thin materials continue to captivate researchers due to their extraordinary physical properties that often surpass those of their bulk forms. Among them, two-dimensional (2D) silicates hold particular promise, yet their nonlinear optical characteristics remain largely underexplored. This study provides an in-depth analysis of the size-dependent nonlinear optical response and optical limiting characteristics of 2D rhodonite ...
Added: March 16, 2026
Бабичев А. В., Makhov I., Kryzhanovskaya N. et al., Письма в Журнал технической физики 2025 № 21 С. 58–62
Продемонстрирована генерация в микролазерах на основе вертикального микрорезонатора при температуре 244 K. Пороговая поглощенная оптическая мощность, длина волны генерации и добротность микролазера с диаметром 4 µm составили ∼ 2.8 mW, 989 nm и 12 000 соответственно. Минимальная пороговая поглощенная оптическая мощность (250 µW) соответствует температуре 168 K. ...
Added: March 13, 2026
Babichev A., Blokhin A., Zadiranov Y. et al., Applied Physics Letters 2026 Vol. 128 No. 5 Article 051105
High-quality micropillar cavities were grown using molecular-beam epitaxy. Stable continuous-wave lasing at room temperature was demonstrated for microlasers with semiconductor and hybrid output mirrors. At 300 K, single-mode lasing was demonstrated for micropillars with a diameter of 5 um at a wavelength of 960 nm, with a minimum lasing threshold of 1.2 mW and the ...
Added: March 13, 2026
Tolstoy V., Nikitin K., Kuzin A. et al., Chemical Communications 2024 Vol. 60 No. 23 P. 3182–3185
In this study, Pt(0) microscrolls are synthesized on polished Ni via galvanic replacement reaction (GRR). Employing in situ optical microscopy, the dynamic motion of the catalytic microscrolls as micromotors in H2O2 solutions is revealed. This method offers a rapid fabrication of scrolls from diverse noble metals and alloys. ...
Added: March 2, 2026
Xiao Y., Xue W., Xu N. et al., Rare Metals 2025 Vol. 44 No. 11 P. 8757–8768
Complete collection of target fluids and effective capture of biomolecules are essential when designing and fabricating sensor electrodes. Assembling a conductive metal–organic framework (MOF) film onto a high-surface-area porous aerogel to create a three-dimensional (3D) hierarchically ordered structure represented an effective strategy for fabricating sensor electrodes for body fluid detection. In this study, high-precision, confined ...
Added: March 2, 2026
Li S., Novikova S., Stenina I. et al., Mendeleev Communications 2025 Vol. 35 No. 5 P. 560–562
A sulfur–reduced graphene oxide (rGO) composite was investigated as a cathode material for lithium–sulfur batteries. The cathode material containing both monoclinic (g-S) and orthorhombic (a-S) sulfur and rGO exhibits excellent electrochemical performance. The discharge capacity of (a+g)S@rGO in Li–S battery at C/8 is 950 and 620 mAh g−1 for cycles 1 and 20, respectively. © 2025 ...
Added: February 17, 2026
A. S. Gurskiy, Shapovalov D. L., E. Ph. Pozdnyakova et al., Physics of Metals and Metallography 2025 Vol. 126 No. 12 P. 1467–1471
Experiments on normal metal-insulator-superconductor (NIS) tunnel junctions provide critical insights into electron transport, relaxation mechanisms, and may be used to study the phase coherence in metallic and superconducting materials. In this work, we present experimental study of nonequilibrium quasiparticle transport at ultra-low temperatures in NIS tunnel nanostructures representing a solid-state analogue of a double slit ...
Added: February 10, 2026
Vyacheslav D. Neverov, Kalashnikov A., Andrey V. Krasavin et al., Beilstein Journal of Nanotechnology 2026 Vol. 17 P. 57–62
We present a comprehensive microscopic study of the intermediate mixed state in superconductors of the intertype (IT) regime separating types I and II. Using fully self-consistent Bogoliubov–de Gennes calculations for a lattice model, we analyze few-vortex configurations across the entire temperature range 0 < T < Tc. Our results demonstrate the key features of IT superconductivity, ...
Added: January 8, 2026
Tomayeva M., Vyacheslav D. Neverov, Andrey V. Krasavin et al., Beilstein Journal of Nanotechnology 2025 Vol. 16 P. 2265–2273
In the ballistic regime at finite temperatures, the proximity effect diminishes following an exponential pattern; however, at low or zero temperatures, this transition alters to a decay characterized by a power law with a dimensionality-dependent exponent. Here, we extend the current understanding of the proximity effect by exploring the role of normal metal–superconductor (NS) junction ...
Added: January 8, 2026
Ивашенцева И. В., Федотов П. В., Каурова Н. С. et al., Журнал технической физики 2024 Т. 94 № 8 С. 1391–1397
A technology for sensitizing a structure consisting of a graphene nanoribbon (GNR) on a Si/GNR silicon substrate in the near-IR range of the electromagnetic spectrum is presented. This technology is based on doping the GNR with He4. A more than 25-fold increase in the response at a wavelength of 1.35 μm in the Si/GNR/He4 structure, ...
Added: December 23, 2025