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Nonlinear polaritons in a monolayer semiconductor coupled to optical bound states in the continuum

Light(Science & Applications) 2020年第1期9卷 1480-1487页

作者： Vasily Kravtsov Ekaterina Khestanova Fedor A.Benimetskiy Tatiana Ivanova Anton K.Samusev Ivan S.Sinev dmitry Pidgayko Alexey M.Mozharov Ivan S.Mukhin Maksim S.Lozhkin Yuri V.Kapitonov Andrey S.Brichkin vladimir d.kulakovskii Ivan A.Shelykh Alexander I.Tartakovskii Paul M.Walker Maurice S.Skolnick dmitry N.Krizhanovskii Ivan V.Iorsh ITMO University Saint Petersburg 197101Russia St.Petersburg Academic University Saint Petersburg 194021Russia Saint Petersburg State University ul.Ulyanovskaya 1Saint Petersburg 198504Russia Institute of Solid State Physics RASChernogolovka 142432Russia Science Institute University of IcelandDunhagi 3IS-107ReykjavikIceland department of Physics and Astronomy University of SheffieldSheffield S37RHUK

Optical bound states in the continuum(BICs)provide a way to engineer very narrow resonances in photonic *** extended interaction time in these systems is particularly promising for the enhancement of nonlinear optical processes and the development of the next generation of active optical ***,the achievable interaction strength is limited by the purely photonic character of optical ***,we mix the optical BIC in a photonic crystal slab with excitons in the atomically thin semiconductor MoSe_(2) to form nonlinear exciton-polaritons with a Rabi splitting of 27 meV,exhibiting large interaction-induced spectral *** asymptotic BIC-like suppression of polariton radiation into the far field toward the BIC wavevector,in combination with effective reduction of the excitonic disorder through motional narrowing,results in small polariton linewidths below 3 *** with a strongly wavevector-dependent Q-factor,this provides for the enhancement and control of polariton–polariton interactions and the resulting nonlinear optical effects,paving the way toward tuneable BIC-based polaritonic devices for sensing,lasing,and nonlinear optics.

关键词： polar nonlinear continuum

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Study of asphaltene reaggregation in toluene/heptane mixture by dynamic and static light scattering

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Petroleum Research 2024年第1期9卷 48-54页

作者： vladimir N.Kuryakov Oil and Gas Research Institute of RAS(OGRI RAS) Gubkina Str.3119333MoscowRussian Federation

This paper presents the study of the effect of multiple ultrasonic impacts on submicron asphaltene aggregates in a toluene/heptane solution,conducted with dynamic light scattering *** objects of the study were four samples of asphaltenes obtained from four different *** all samples,the change in the average size of the asphaltene submicron aggregates with time was measured after the addition of a precipitant(heptane)to a solution of asphaltenes in toluene at an amount above the threshold *** aggregates formed in solution after the addition of the precipitant and were subjected to ultrasonic treatment,which led to the destruction of the asphaltene *** of destroyed asphaltenes was *** kinetics of this aggregation were similar to the kinetics of aggregation of asphaltenes after the addition of a *** iterations of asphaltene aggregate destruction in the sample led to a significant change in the kinetics of aggregation:the growth of aggregates slowed and stabilized at a size of approximately 200 nm and 30 nm for the different studied samples.

关键词： Asphaltenes Aggregation Sonication dynamic light scattering Re-aggregation Colloidal stability Resins

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Inversion of walkaway VSP data in the presence of lateral velocity heterogeneity

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Energy Geoscience 2024年第2期5卷 304-313页

作者： vladimir Grechka Ilya Tsvankin Pedro Contreras CWP Department of GeophysicsColorado School of MinesGoldenCO80401USA PdVSA-INTEVEP Apartado 76343Caracas1070AVenezuela Borehole Seismic LLC USA department of Physics ULAVenezuela

Multi-azimuth walkaway vertical seismic profiling is an established technique for the estimation of in situ slowness surfaces and inferring anisotropy ***,this technique requires the assumption of lateral homogeneity,which makes the horizontal slowness components at depths of downhole receivers equal to those measured at the *** violations of this assumption,such as lateral heterogeneity or nonzero dip of intermediate interfaces,lead to distortions in reconstructed slowness surfaces and,consequently,to errors in estimated anisotropic *** this work,we relax the assumption of lateral homogeneity and discuss how to correct vertical seismic profile data for weak lateral *** describe a procedure of downward continuation of recorded traveltimes that accounts for the presence of both vertical inhomogeneity and weak lateral heterogeneity,which produces correct slowness surfaces at depths of downhole receivers,noticing that sufficiently dense receiver coverage along a borehole is required to separate influences of vertical and lateral heterogeneity on measured traveltimes and obtain accurate estimates of the slowness *** the slowness surfaces are found and a desired type of anisotropic model to be inverted is selected,the corresponding anisotropic parameters,providing the best fit to the estimated slownesses,can be *** invert the slowness surfaces of P-waves for parameters of the simplest anisotropic model describing dipping fractures(transversely isotropic medium with a tilted symmetry axis).Five parameters of this model,namely,the P-wave velocity V0 in the direction of the symmetry axis,Thomsen's anisotropic coefficients e and d,the tilt n,and the azimuth b of the symmetry axis,can be estimated in a stable manner when maximum source offset is greater than half of receiver depth.

关键词： Walkaway vertical seismic profile Lateral velocity heterogeneity Anisotropic parameter estimation Vertical inhomogeneity

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Ferroelectricity Induced by Oxygen Vacancies in Rhombohedral ZrO_(2) Thin Films

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Energy & Environmental Materials 2024年第1期7卷 229-237页

作者： Veniero Lenzi José P.B.Silva Břetislav Šmíd vladimir Matoín Cosmin M.Istrate Corneliu Ghica Judith L.MacManus-driscoll Luís Marques Physics Center of Minho and Porto Universities(CF-UM-UP) University of MinhoCampus de Gualtar 4710-057Braga Portugal Laboratory of Physics for Materials and Emergent Technologies LapMETUniversity of Minho4710-057Braga Portugal department of Surface and Plasma Science Faculty of Mathematics and PhysicsCharles UniversityV Holešovičkách 218000Prague 8 Czech Republic National Institute of Materials Physics 105 bis Atomistilor 077125Magurele Romania department of Materials Science and Metallurgy 27 Charles Babbage Rd.Cambridge CB3 OFSUK

Rhombohedral phase Hf_(x)Zr_(1.x)O_(2)(HZO,x from 0 to 1)films are promising for achieving robust ferroelectric polarization without the need for an initial wake-up pre-cycling,as is normally the case for the more commonly studied orthorhombic ***,a large spontaneous polarization observed in rhombohedral films is not fully understood,and there are also large discrepancies between experimental and theoretical *** this work,in rhombohedral ZrO_(2)thin films,we show that oxygen vacancies are not only a key factor for stabilizing the phase,but they are also a source of ferroelectric polarization in the *** is shown experimentally through the investigation of the structural properties,chemical composition and the ferroelectric properties of the films before and after an annealing at moderate temperature(400℃)in an oxygen environment to reduce the V_(o)concentration *** experimental work is supported by density functional theory(dFT)calculations which show that the rhombohedral phase is the most stable one in highly oxygen defective ZrO_(2)*** dFT calculations also show that V_(o)contribute to the ferroelectric *** findings reveal the importance of V_(o)for stabilizing rhombohedral ZrO_(2)thin films with superior ferroelectric properties.

关键词： charged defects ferroelectric polarization rhombohedral phase stability zirconia

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Superior piezoelectric performance with high operating temperature in bismuth ferrite-based ternary ceramics

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Journal of Materials Science & Technology 2024年第2期169卷 172-181页

作者： Yunyao Huang Leiyang Zhang Ruiyi Jing Yang Yang vladimir Shur Xiaoyong Wei Li Jin Electronic Materials Research Laboratory Key Laboratory of the Ministry of EducationSchool of Electronic Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaBeijing University of TechnologyBeijing 100124China School of Natural Sciences and Mathematics Ural Federal UniversityEkaterinburg620000Russia

due to the thermal depolarization effect,adequate piezoelectric performance with high operating temperature is regarded to be challenging to accomplish concurrently in piezoceramics for applications in specific piezoelectric *** this work,we synthesized(0.8−x)BiFeO_(3)-x PbTi_(3)-0.2Ba(Zr_(0.25)Ti_(0.75))O_(3)(abbreviated as BFO-x PT-BZT)ternary solid solutions with 0.15≤x≤0.30 by conventional solid-state reaction *** MPB composition with a coexisting state of rhombohedral-tetragonal phases exhibits enhanced electromechanical properties,including Curie temperature of 380℃,large-signal equivalent piezoelectric coefficient d^(∗)_(33)of 395 pm V^(-1),small-signal piezoelectric coefficient d_(33)of 302 pC N^(-1),and electromechanical coupling factor k_(p)of 50.2%,which is comparable to commercial PZT-5A ceramics,indicating potential in high-temperature ***,in-situ X-ray diffraction(XRd)and piezoelectric force microscopic(PFM)techniques demonstrate that multiphase coexistence and complex nanodomains promote piezoelectric response via *** x=0.24 composition exhibits the highest in-situ d_(33)of 577 pC N^(-1)and good temperature stability in 30−280℃,indicating that BZT-modified BFO-PT ceramics are promising candidates for high-temperature piezoelectric devices.

关键词： High-temperature piezoelectrics Morphotropic phase boundary In-situ technique domain structure BFO

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Flat-footed Females and Missing Males:A New Genus and Species of Pleciofungivoridae(diptera:Bibionomorpha)Represents the First Record of the Family from Mid-Cretaceous Kachin Amber

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Acta Geologica Sinica(English Edition) 2024年第3期98卷 541-547页

作者： ZHANG Qingqing Wiesław KRZEMINSKI Jan SEVCIK vladimir BLAGOdEROV Agnieszka SOSZYNSKA Kornelia SKIBINSKA Yunnan Key Laboratory for Palaeobiology Institute of PalaeontologyYunnan UniversityKunming 650500China MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment Yunnan UniversityKunming 650500China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesNanjing 210008China Institute of Systematics and Evolution of Animals Polish Academy of Sciences52551 KrakówPoland University of Ostrava Faculty of ScienceDepartment of Biology and EcologyChittussiho 10CZ-71000 OstravaCzech Republic National Museums Scotland EdinburghUK Natural History Museum LondonUK University of Lodz Faculty of Biology and Environmental ProtectionDepartment of Invertebrate Zoology and HydrobiologyBanacha 12/1690-237ŁódźPoland

A new genus and species,Cretopleciofungivora simpsoni *** ***.,from the extinct family Pleciofungivoridae(diptera:Bibionomorpha),is discovered in mid-Cretaceous Kachin ***,this family was known only from imprints in sedimentary rocks of the Jurassic and the Lower *** of a representative of Pleciofungivoridae in Kachin amber confirms the presence of the family in the Upper *** new species has a unique structure of fore tarsus,with lobed and extended tarsal segments Ⅱ to Ⅳ,a feature hitherto known only in a few species of extant *** not particularly rare,the new species is currently known only from female *** reasons for this phenomenon,very unusual in Sciaroidea,are briefly discussed,including parthenogenesis as a potentially plausible hypothesis.

关键词： fungus gnats Sciaroidea Upper Cretaceous Burmese amber swollen tarsomeres

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Outcomes of long-acting injectable antipsychotics use in pregnancy:A literature review

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World Journal of Psychiatry 2024年第4期14卷 582-599页

作者： Ana V Pejčić Srdjan M Stefanović MilošN Milosavljević vladimir S Janjić Marko M Folić Nevena d Folić Jovana Z Milosavljević department of Pharmacology and Toxicology Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia department of Pharmacy Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia department of Clinical Pharmacology University Clinical Center KragujevacKragujevac 34000Serbia department of Psychiatry Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Clinic for Psychiatry University Clinical Center KragujevacKragujevac 34000Serbia Center for Pharmaceutical and Pharmacological Research Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia department of Pediatrics Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia Pediatric Clinic University Clinical Center KragujevacKragujevac 34000Serbia department of Anatomy Faculty of Medical SciencesUniversity of KragujevacKragujevac 34000Serbia

BACKGROUNd Women with a history of serious psychotic disorders are at increased risk of disease relapse during ***-acting injectable(LAI)antipsychotics have been widely used to improve adherence and prevent relapse in patients with various severe psychotic disorders,but there is a lack of high-quality data from previous research on the safety of LAI antipsychotics during *** To summarize relevant data on maternal,pregnancy,neonatal,and developmental outcomes from published cases of LAI antipsychotic use in *** A literature search was performed through November 11,2023,using three online databases:PubMed/MEdLINE,Scopus,and Web of *** reports or case series that reported information about the outcomes of pregnancy in women who used LAI antipsychotics at any point in pregnancy,with available full texts,were *** statistics,narrative summation,and tabulation of the extracted data were *** A total of 19 publications satisfied the inclusion criteria:3 case series,15 case reports,and 1 conference *** reported the outcomes of LAI antipsychotic use in 74 women and 77 *** use of secondgeneration LAI antipsychotics was reported in the majority(n=47;61.0%)of ***-generation LAI antipsychotics were administered during 30 pregnancies(39.0%).Most of the women(approximately 64%)had either satisfactory control of symptoms or no information about relapse,while approximately 12%of them had developed gestational diabetes mellitus.A minority of cases reported adverse outcomes such as stillbirth,spontaneous abortion,preterm birth,low birth weight,congenital anomalies,and neurological manifestations in ***,there were no reports of negative long-term developmental *** Currently available data seem reassuring,but further well-designed studies are required to properly evaluate the risks and benefits of LAI antipsychotic use during pregnancy.

关键词： Antipsychotic agents Long-acting injectable Pregnancy Outcome Review

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Assessment of the ecological state of haplic chernozem contaminated by oil,fuel oil and gasoline after remediation

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Petroleum Research 2024年第1期9卷 155-164页

作者： Anna Ruseva Tatiana Minnikova Sergey Kolesnikov dmitry Trufanov Nikita Minin Sofya Revina vladimir Gayvoronsky Southern Federal University Academy of Biology and Biotechnology344090Rostov-on-DonRussia

The intensive use of petroleum hydrocarbon products has made them priority environmental *** petroleum hydrocarbons enter the soil,a change in physical,chemical,and biological properties is *** natural restoration of oil-contaminated soils is a lengthy process;therefore,remediation is often *** aim of this study is to assess the change in the ecological state of haplic chernozem soil contaminated with oil,fuel oil,and gasoline after *** indicators of soil biological activity,such as phytotoxicity(germination,length of shoots and roots),the activity of oxidoreductase enzymes(catalase and dehydrogenases),and the total number of bacteria were *** effects of nitroammophoska fertilizer,sodium humate,biochar,and the biofertilizer“Baikal EM-1”on the ecological state of soils contaminated with oil,fuel oil,and gasoline were *** with oil,fuel oil,and gasoline decreased the values of all biological *** most sensitive indicator was the length of radish roots in soils polluted with oil,gasoline,and fuel oil after remediation with nitroammophoska and Baikal EM-1 *** length of roots was the most sensitive indicator when remediation was performed with biochar and sodium humate added to soil contaminated with oil and gasoline,and with contamination of haplic chernozem soil with fuel oil,the total number of bacteria was the most sensitive *** most effective ameliorant to phytotoxicity indicators for oil pollution was a 1 d dose of biochar,for fuel oil it was 1 d biochar and 2 d sodium humate,and for gasoline it was a 2 d dose of biochar and Baikal *** ameliorants at most of the studied doses increased dehydrogenase activity,but increased catalase activity only in some *** increase in the total number of bacteria in oil-contaminated soils was promoted by biochar and nitroammophoska at a dose of 2 *** was the most effective in ameliorant in soils contaminated with fuel

关键词： Pollution Petroleum hydrocarbons Haplic chernozem Ameliorant dose Biological indicators Soil properties

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Cosmic Bubbles

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Journal of High Energy Physics, Gravitation and Cosmology 2024年第1期10卷 438-453页

作者： vladimir S. Netchitailo Freelancer Livermore USA

The present paper is inspired by the article “Ho’oleilana: An Individual Baryon Acoustic Oscillation?” published by R. B. Tully, C. Howlett, and d. Pomarède on Sep. 2023 [1]. They claim: Evidence is presented here for the discovery of a remarkably strong individual contribution to the baryon acoustic oscillation (BAO) signal at z = 0.068, an entity that is given the name Ho’oleilana. K. dawson, co-spokesperson for dark Energy Spectroscopic Instrument is more inclined to believe that this latest finding is something of a coincidence, a chance alignment that simply looks like a sphere with a radius around what you’d expect for a BAO [2]. In this paper, we provide a short summary of experimental observations of Boötes Void and Superclusters;discuss the main features of the developed Hypersphere World-Universe Model;introduce notions “Cosmic Voids” and “Cosmic Bubbles”;elaborate a mathematical framework for different types of Cosmic Bubbles (Hubble Spherical Bubble for the World, disk Bubbles for Galaxies;Spherical Bubbles for Extrasolar Systems, dark Matter (dM) Spherical Bubbles for Galaxies and Superclusters);make a conclusion that the Boötes is a dM Cosmic Bubble and suggest experiments, which confirm our conclusion.

关键词： World-Universe Model Boötes Void Boötes Superclusters Macroobjects Bubbles dark Matter Bubbles Fermi Bubbles Boötes Bubbles

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Fine 3d control of THz emission in air with dual femtosecond laser pre-pulses at tunnelling ionisation regime

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Light(Advanced Manufacturing) 2024年第3期5卷 62-74页

作者： Hsin-Hui Huang Takeshi Nagashima Kota Kumagai Yoshio Hayasaki Saulius Juodkazis vladimir T.Tikhonchuk Koji Hatanaka Optical Sciences Centre ARC Training Centre in Surface Engineering for Advanced Materials(SEAM)School of ScienceSwinburne University of TechnologyHawthornVictoria 3122Australia Faculty of Science and Engineering Setsunan University17-8 Ikeda-NakamachiNeyagawaOsaka572-8508Japan Center for Optical Research and Education(CORE) Utsunomiya University7-1-2 YotoUtsunomiya 321-8585Japan WRH Program International Research Frontiers Initiative(IRFI)Tokyo Institute of Technology Nagatsuta-choMidori-kuYokohamaKanagawa 226-8503 Japan Laser Research Center Physics FacultyVilnius UniversitySauletekio Ave.1010223 VilniusLithuania Centre Lasers Intenses et Applications Universite de Bordeaux351Cours de la Liberation33405 Talence cedexFrance Extreme Light Infrastructure ERIC ELI Beamlines FacilityZa Radnicic 83525241 Dolni BřežanyCzech Republic Organization for Research Strategy and development Okayama Univ.1-1-1 Tsushima-nakaKita-kuOkayama 700-8530Japan

Emission of THz radiation from air breakdown at focused ultra-short fs-laser pulses(800 nm/35 fs)was investigated for the 3d spatio-temporal control where two pre-pulses are used before the *** laser pulse induced air breakdown forms a~120μm-long focal volume generate shockwaves which deliver a denser air into the focal region of the main pulse for enhanced generation of THz radiation at 0.1-2.5 THz spectral *** intensity of 162 pre-and main-pulses was at the tunnelling ionisation intensities(1-3)×10 W/cm and corresponded to sub-critical(transparent)plasma formation in *** analysis of THz radiation revealed that orientation of the air density gradients generated by pre-pulses and their time-position locations defined the ellipticity of the generated THz electrical *** rotational component of electric current is the origin of THz radiation.

关键词： THz radiation Femtosecond laser induced breakdown Air breakdown spatio-temporal control

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