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Nonlinear spectroscopy of excitonic states in transition metal dichalcogenides
Physical Review B: Condensed Matter and Materials Physics. 2022. Vol. 105. No. 11. Article 115436.
Zhumagulov Y., Vyacheslav D. Neverov, Alexander E. Lukyanov, Gulevich D., Andrey V. Krasavin, Vagov A., Perebeinos V.
Second-harmonic generation (SHG) is a well-known nonlinear spectroscopy method to probe electronic
structure, specifically, in transition metal dichalcogenide (TMDC) monolayers. This work investigates the
nonlinear dynamics of a strongly excited TMDC monolayer by solving the time evolution equations for the
density matrix. It is shown that the presence of excitons qualitatively changes the nonlinear dynamics leading,
in particular, to a huge enhancement of the nonlinear signal as a function of the dielectric environment. It is also
shown that the SHG polarization angular diagram and its dependence on the driving strength are very sensitive
to the type of exciton state. This sensitivity suggests that SHG spectroscopy is a convenient tool for analyzing
the fine structure of excitonic states.
Language:
English
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
Tatarin S., Zhuravlev I., Minin M. et al., Inorganic Chemistry 2025 Vol. 64 No. 50 P. 24579–24593
To date, the design of stable panchromatic metal complexes simultaneously exhibiting reversible redox behavior remains a challenging endeavor, underscoring the need for new ligand platforms to expand their absorption spectrum. In this study, we report the synthesis and characterization of octahedral bis-cyclometalated iridium(III) complexes with redox-active o-semiquinone/o-iminosemiquinone ancillary ligands, which exhibit exceptional chemical stability and intense ...
Added: February 17, 2026
Shavlovich A. V., Reshetov I., Tagantsev D. et al., Journal of Physics: Condensed Matter 2024 Vol. 36 No. 21 Article 21LT01
Two sodium phosphate glasses with different structure (meta- and orthophosphate ones) were thermally poled well below the glass transition temperatures. Glass with an orthophosphate structure (glass LA30) demonstrated a typical behavior of polarization current, that is, monotonic current decrease; however, in glass with a metaphosphate structure (glass LA10) the current first increased for 15–20 min and only then started ...
Added: September 22, 2025
Scherbak S., Reshetov I., Valentina Zhurikhina et al., Journal of the American Ceramic Society 2024 Vol. 107 No. 8 P. 5569–5577
For the first time,we have registered, studied, andmodeled the Maxwell–Wagner effect in structures with a smooth gradient of charge carriers’ mobility. The Maxwell–Wagner charge, formed after applying a DC voltage to the gradient
structure at room temperature, is distributed over the entire region of the gradient. The experiments were performed with slides of a soda-lime glass subjected to sodium-to-potassium ion ...
Added: September 22, 2025
Kan G., Scherbak S., Pleshakov O. et al., Optical Materials 2025 Vol. 160 Article 116770
Maxwell-Wagner charge and electric field formation, as well as the associated generation of the electric field induced second harmonic (SH), are firstly studied in soda-lime glass structures produced with electric field assisted potassium-to-sodium ion exchange. The measured Maxwell-Wagner charge accumulation times are in the range of minutes and depend on the thickness of subsurface region enriched with potassium ...
Added: September 22, 2025
Тихомирова Т. В., Бычкова А. Н., Шишлова А. А. et al., Известия РАН. Серия химическая 2025 Т. 74 № 7 С. 2052–2061
Optimal conditions have been selected for the production of new phenol—azo dyes of different compositions, namely 2-phenyldiazenyl-4-(2-phenylpropan-2-yl)phenol and (2,6-dibromo)phenyldiazenyl-4-(2-phenylpropan-2-yl)phenol. The synthesized dyes were used for nucleophilic substitution with 3- and 4-nitrophthalonitrile to form 3/4-[2-phenyldiazenyl-4-(2-phenyl)propan-2-yl]phenoxy- and 3/4-[2-(2,6-dibromo)phenyldiazenyl]-4-(2-phenylpropan-2-yl)phenoxypthalonitriles. The metal complexes were synthesized by template condensation in a solution of the corresponding phthalonitrile with zinc or magnesium ...
Added: September 16, 2025
Бычкова А. Н., Тихомирова Т. В., Мыкина Е. А. et al., Известия РАН. Серия химическая 2024 Т. 73 № 4 С. 965–974
С привлечением реакций диазотирования и азосочетания синтезирован 1-[4-(4-метоксифенил)азо]нафтол. Его использовали в качестве нуклеофила для получения 3- и 4-[(4-метоксифенилазо)-4-нафтокси]фталонитрилов. Темплатной конденсацией этих замещенных фталонитрилов с ацетатами цинка и магния синтезированы соответствующие металлокомплексы фталоцианинов. Определено влияние положения заместителя на процессы про тонирования и спектральные характеристики металлофталоцианинов. Изучены люминесцентные свойства синтезированных металлокомплексов и фотосенсибилизация синглетного кислорода. ...
Added: September 16, 2025
Erzunov D., Alekseeva A., Sarvin I. et al., Journal of Porphyrins and Phthalocyanines 2024 Vol. 28 No. 09n10 P. 701–709
Peripheral phenyl-substituted metal phthalocyanines with thio and oxa substitution in the spacer bridge fragment were obtained in the work. Spectroscopic properties were studied for the obtained complexes, and the main patterns of behavior and characteristics change depending on the solvent and the nature of the spacer atom. It is shown that the replacement of an oxygen ...
Added: September 16, 2025
Санина Н. А., Конюхова А. С., Корчагин Д. В. et al., Журнал неорганической химии 2023 Т. 68 № 9 С. 1165–1180
New neutral binuclear tetranitrosyl iron complexes of the composition [Fe2R2(NO)4] (R = 2,4-difluorothiophenyl(1) and 3,4-difluorothiophenyl(2)), donors of nitrogen oxide (NO), have been synthesized. The complexes were studied by Mossbauer, IR, and EPR spectroscopy, X-ray diffraction, and elemental analysis. The antibacterial activity and cytotoxicity in Vero cells of the complexes 1, 2 and the previously synthesized ...
Added: September 14, 2025
Н. Новгород: ИПФ РАН, 2025.
Секции семинара:
Источники и приемники излучения терагерцового диапазона.
Источники мощного микроволнового излучения.
Приемники микроволнового излучения, спектроскопия и метрология.
Миллиметровое и субмиллиметровое излучение в прикладных исследованиях. ...
Added: July 1, 2025
Dmitriev A. Y., Vasenin A. V., Gunin S. A. et al., Physical Review A: Atomic, Molecular, and Optical physics 2025 Vol. 111 No. 4 Article 043715
A cascade of two-level superconducting artificial atoms—a source and a probe—strongly coupled to a semi-infinite waveguide is a promising tool for observing nontrivial phenomena in quantum nonlinear optics. The probe atom can scatter an antibunched radiation emitted from the source, thereby generating a field with specific properties. We experimentally demonstrate wave mixing between nonclassical light ...
Added: June 21, 2025
Седов В. С., Мартьянов А. К., Павленко М. И. et al., Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 2023 Vol. 382 No. 2265 Article 20230167
Tin-Vacancy (Sn-V) colour centres in diamond have a spin coherence time in the millisecond range at temperatures of 2 K, so they are promising to be used in diamond-based quantum optical devices. However, the incorporation of large Sn atoms into a dense diamond lattice is a non-trivial problem. The objective of our work is to use ...
Added: April 28, 2025
Melnikov A., A. A. Sokolik, Selivanov Y. G. et al., Journal of Applied Physics 2025 Vol. 137 No. 16 Article 163104
We report the observation of the electro-optic effect in Bi2Se3 crystals induced by an intense single-cycle terahertz pulse. The effect reveals itself as a transient change of the polarization state of a femtosecond laser pulse reflected from the crystal that is exposed to the terahertz electric field. The corresponding experimental signal follows the field with ...
Added: April 24, 2025
Томск: В-Спектр, 2023.
Сборник содержит материалы докладов, представленных на XIХ Международной научно-практической
конференции «Электронные средства и системы управления» (г. Томск, 15–17 ноября 2023 г.), по следующим направлениям: радиотехнические и телекоммуникационные системы; наноэлектроника СВЧ, интеллектуальные системы проектирования, автоматизация проектирования электронных устройств и систем; космические радиоэлектронные устройства; нанотехнологии в электронике; антенны и микроволновые устройства; приборы и методы контроля; нелинейная оптика; интеллектуальная ...
Added: February 10, 2024
Zhukova V., Mizuk R., Adachi I. et al., Journal of High Energy Physics 2023 Vol. 2023 Article 131
We report the first measurement of the inclusive e+e−→bb¯→D±sX and e+e−→bb¯→D0/D¯0X cross sections in the energy range from 10.63 to 11.02. Based on these results, we determine σ(e+e−→B0sB¯0sX) and σ(e+e−→BB¯X) in the same energy range. We measure the fraction of B0s events at Υ(10860) to be fs=(22.0+2.0−2.1)%. We determine also the ratio of the B0s inclusive branching fractions B(B0s→D0/D¯0X)/B(B0s→D±sX)=0.416±0.018±0.092. The results are obtained using the data collected with the Belle detector at the KEKB ...
Added: November 30, 2023
Valyavin G., Beskin G., Valeev A. et al., Astrophysical Bulletin 2022 Vol. 77 No. 4 P. 495–508
We present a brief description of a joint Russian-Korean project abbreviated as EXPLANATION (EXoPLANet And Transient events InvestigatiON). The project is aimed at a massive photometric, speckle-interferometric, spectral, and radio bolometric search for non-stationary events in the Universe, as well as the study of exoplanets. The core of the project consists of several 0.07–2.5-m optical ...
Added: June 26, 2023
Laktaev I. D., Saidzhonov B. M., Vasiliev R. B. et al., Results in Physics 2020 Vol. 19 Article 103503
In this Letter, we report the second harmonic generation (SHG) in a colloidal solution of CdSe/CdS nanoplatelets (NPLs) in the case of two-photon excitation in the region of exciton transition from the light holes sub-band to the conduction sub-band (549 nm, 1lh-1e) by femtosecond laser pulses (1064 nm, 100 kHz). Discovery of the SHG in ...
Added: October 21, 2022
Reshetov I., Zhurikhina V. V., Tagantsev D. et al., , in: IEEE International Conference on Electrical Engineering and Photonics (EExPolytech).: St. Petersburg: IEEE, 2021. Ch. 38 P. 161–163.
Crystallization of a Na 2 O-K 2 O-Nb 2 O 5 -SiO 2 glass under thermal poling and subsequent annealing was studied by Raman spectroscopy and X-ray diffractometry. It was found that the poling and subsequent thermal treatment lead to partial crystallization of the poled region of the glass, which should be related with watering ...
Added: September 23, 2022
Щербак С. А., Решетов И. В., Zhurikhina V. V. et al., Научно-технические ведомости Санкт-Петербургского государственного политехнического университета. Физико-математические науки 2021 Т. 14 № 4 С. 95–113
В работе представлен подробный теоретический анализ явления генерации второй оптической гармоники двумя поверхностями плоскопараллельного изотропного стеклянного образца. Измерена зависимость интенсивности излучения второй гармоники, генерируемой термически поляризованными натрий-силикатными стеклами, от угла падения фундаментальной волны (полосы Мейкера). Проведено качественное и количественное сравнение результатов моделирования и эксперимента, оценено относительное увеличение квадратичной нелинейной восприимчивости приповерхностной области стекла вследствие поляризации. ...
Added: September 22, 2022