A5091204874- Plasmonic and Surface Plasmon Research
- 2D Materials and Applications
- Strong Light-Matter Interactions
- Metamaterials and Metasurfaces Applications
- Thermal Radiation and Cooling Technologies
- Graphene research and applications
- Mechanical and Optical Resonators
- Topological Materials and Phenomena
- MXene and MAX Phase Materials
- Perovskite Materials and Applications
- Photonic and Optical Devices
- Nanowire Synthesis and Applications
- Quantum optics and atomic interactions
- Atomic and Subatomic Physics Research
- Orbital Angular Momentum in Optics
- Quantum Dots Synthesis And Properties
- Molecular Junctions and Nanostructures
- Nonlinear Optical Materials Studies
- Chalcogenide Semiconductor Thin Films
- Force Microscopy Techniques and Applications
- Advanced Photonic Communication Systems
- Gold and Silver Nanoparticles Synthesis and Applications
- Quantum Mechanics and Non-Hermitian Physics
- Microfluidic and Capillary Electrophoresis Applications
- Thermal properties of materials
University of Sheffield
2019-2024
ITMO University
2018-2023
Saint Petersburg Academic University
2019-2020
Ulsan National Institute of Science and Technology
2020
Physico-Technical Institute
2020
Ioffe Institute
2019
University of Iceland
2019
Institute of Automation and Electrometry
2015-2017
Novosibirsk State University
2015
Russian Academy of Sciences
2015
Abstract Optical bound states in the continuum (BICs) provide a way to engineer very narrow resonances photonic crystals. The extended interaction time these systems is particularly promising for enhancement of nonlinear optical processes and development next generation active devices. However, achievable strength limited by purely character BICs. Here, we mix BIC crystal slab with excitons atomically thin semiconductor MoSe 2 form exciton-polaritons Rabi splitting 27 meV, exhibiting large...
Abstract Modern nanophotonics has witnessed the rise of “electric anapoles” (EDAs), destructive interferences electric and toroidal dipoles, actively exploited to resonantly decrease radiation from nanoresonators. However, inherent duality in Maxwell equations suggests intriguing possibility “magnetic anapoles,” involving a nonradiating composition magnetic dipole dipole. Here, hybrid anapole (HA) mixed character is predicted observed experimentally via dark field spectroscopy, with all...
The rise of quantum science and technologies motivates photonics research to seek new platforms with strong light-matter interactions facilitate behaviors at moderate light intensities. One promising platform reach such interacting regimes is offered by polaritonic metasurfaces, which represent ultrathin artificial media structured on nano-scale designed support polaritons - half-light half-matter quasiparticles. Topological polaritons, or 'topolaritons', offer an ideal in this context,...
Abstract Highly nonlinear optical materials with strong effective photon-photon interactions are required for ultrafast and quantum signal processing circuitry. Here we report Kerr-like nonlinearities by employing efficient transitions of charged excitons (trions) observed in semiconducting transition metal dichalcogenides (TMDCs). By hybridising trions monolayer MoSe 2 at low electron densities a microcavity mode, realise trion-polaritons exhibiting significant energy shifts small photon...
Exciton-polaritons offer a versatile platform for realization of all-optical integrated logic gates due to the strong effective optical nonlinearity resulting from exciton-exciton interactions. In most current excitonic materials there exists direct connection between exciton robustness thermal fluctuations and strength interaction, making with highest levels applicable at cryogenic temperatures only. Here, we show that polaronic effects, characteristic perovskite materials, allow overcoming...
Strain engineering is a powerful tool for tuning physical properties of 2D materials, including monolayer transition metal dichalcogenides (TMD) -- direct bandgap semiconductors with strong excitonic response. Here, we demonstrate an approach local characterization strain-induced modification photoluminescence in TMD-based materials. We reversibly stress MoSe$_2$ AFM tip and perform spatio-spectral mapping the vicinity indentation point. To fully reproduce experimental data, introduce linear...
This work presents the results of an investigation thin layers MoSe2 on graphene by Scanning Probe Microscopy (SPM) methods. Dependences surface potential and function number monolayers structure are presented. The dependence air humidity is shown. band doping monolayer was determined. These data can be important for detecting designing nanodevices, because has a strong influence operation such devices.
Whispering-gallery-mode disk optical nanocavities with an enhancement factor up to 100 can be fabricated from bulk transition metal dichalcogenides having indirect bandgap using scanning probe lithography.
The electronic and optoelectronic properties of van der Waals heterostructures are strongly affected by heterobarrier heights at the interfaces between monolayers forming structure environment. In this work, MoSe2/graphene/6H-SiC studied scanning probe microscopy photoluminescence spectroscopy in various ambient conditions. To improve our understanding processes, a work function monolayer MoSe2 its dependence on number layers were determined Kelvin microscopy. A nonuniform distribution...
Abstract Recently reported large values of exciton–polariton nonlinearity transition metal dichalcogenide (TMD) monolayers coupled to optically resonant structures approach the characteristic for GaAs-based systems in regime strong light-matter coupling. Contrary latter, TMD-based polaritonic devices remain operational at ambient conditions and therefore have greater potential practical nanophotonic applications. Here, we present study nonlinear properties Ta 2 O 5 slab waveguide a WSe...
Monolayers of semiconducting transition metal dichalcogenides (TMDs) have long attracted interest for their intriguing optical and electronic properties. Recently, TMDs in quasi-bulk form started to show considerable promise nanophotonics thanks high refractive indices, large anisotropy, wide transparency windows reaching the visible, robust room temperature excitons promising nonlinear optics. Adherence TMD layers any substrate via van der Waals forces is a further key enabler...
Optical bound states in the continuum (BICs) provide a way to engineer very narrow resonances photonic crystals. The extended interaction time such systems is particularly promising for enhancement of nonlinear optical processes and development next generation active devices. However, achievable strength limited by purely character BICs. Here, we mix BIC crystal slab with excitons atomically thin semiconductor MoSe$_2$ form exciton-polaritons Rabi splitting 27~meV, exhibiting large...
Exciton–polaritons are unique quasiparticles with hybrid properties of an exciton and a photon, opening ways to realize ultrafast strongly nonlinear systems inversion-free lasers based on Bose–Einstein polariton condensation. However, the real-world applications still limited due temperature operation costly fabrication techniques for both materials photon cavities. 2D perovskites represent one most prospective platforms realization strong light-matter coupling since they support...
Van der Waals (vdW) heterostructures are promising for next-generation two-dimensional electronic and optoelectronic devices. The performance of such devices is completely determined by the properties interface. However, due to a lack contamination-free fabrication techniques, obtaining an ideal interface still challenge. Meanwhile, efficiency photodetectors solar cells highly dependent on charge separation Thus, questions effect interfacial conditions contact type, redistribution,...
Optical and electrical properties of MoSe2 monolayer transferred to graphene/SiC substrate are studied by scanning probe microscopy photoluminescence spectroscopy. By Kelvin it was measured a work function the (4.3 eV) revealed n-type doping. With increasing layers quantity also increases which leads reducing Schottky barrier height between SPM layers. Monolayer graphene quenches while bilayer does not perturb photoluminescence.
Abstract This work presents the results of an investigation WSe 2 thin layers on Ni film by Scanning Probe Microscopy (SPM) methods. To determine surface potential, Kelvin probe force gradient microscopy (KPFGM) was used. Dependences potential and function number monolayers structure are presented. The band type doping monolayer were determined. These data can be important for measuring KPFGM designing nanodevices because have a strong influence operation such devices.
Scanning probe microscopy is widely known not only as a well-established research method but also set of techniques enabling precise surface modification. One such technique local anodic oxidation (LAO). In this study, we investigate the LAO MoSe2 transferred on an Au/Si substrate, focusing specifically dependence height and diameter oxidized dots applied voltage time exposure at various humidities. Depending humidity, two different regimes were identified. The first, relative humidity (RH)...
Monolayers of semiconducting transition metal dichalcogenides (TMDs) have long attracted interest for their intriguing optical and electronic properties. Recently TMDs in quasi-bulk form started to show considerable promise nanophotonics thanks high refractive indices, large anisotropy, wide transparency windows reaching the visible, robust room temperature excitons promising nonlinear optics. Adherence TMD layers any substrate via van der Waals forces is a further key enabler...
Modern nanophotonics has witnessed the rise of "electric anapoles", destructive interferences electric dipoles and toroidal dipoles, actively exploited to cancel dipole radiation from nanoresonators. However, inherent duality Maxwell's equations suggests intriguing possibility "magnetic involving a nonradiating composition magnetic dipole. Here, we predict, fabricate observe experimentally via series dark field spectroscopy measurements hybrid anapole mixed character, with all dominant...
Abstract In this work, we investigate mechanical scanning probe lithography (SPL) of thick MoSe2 flakes. The conventional technique faces difficulties in processing the samples due to cantilever twisting that leads growth a number defects and artifacts decrease spatial resolution. course proposed approach frictional-SPL based on small pressure force many repetitions lithographic patterns. This allows avoid formation remarkable maintain high By frictional-SPL, processed flakes (up 40 nm...
Abstract In this work, we demonstrate the possibility of using mechanical Scanning probe lithography (m-SPL) for fabricating nanophotonic devices based on multilayered transition metal dichalcogenides (TMDCs). By m-SPM, created a resonator from 70-nm thick MoSe 2 flake transferred Si/Au substrate. The optical properties structure were investigated by measuring microphotoluminescence. exhibits four resonance PL peaks shifted in long-wavelength area peak. Thus, here that m-SPL is...