A5046841762- Advanced Thermoelectric Materials and Devices
- Terahertz technology and applications
- Thermal properties of materials
- Superconducting and THz Device Technology
- Intermetallics and Advanced Alloy Properties
- Metamaterials and Metasurfaces Applications
- Thermography and Photoacoustic Techniques
- Thermal Radiation and Cooling Technologies
- Advanced Semiconductor Detectors and Materials
- nanoparticles nucleation surface interactions
- Heat Transfer and Optimization
- Advanced materials and composites
- Metallurgical and Alloy Processes
- Advanced ceramic materials synthesis
- Heusler alloys: electronic and magnetic properties
- Topological Materials and Phenomena
- Photonic and Optical Devices
- Material Properties and Applications
- Plasmonic and Surface Plasmon Research
- Semiconductor Quantum Structures and Devices
- Surface and Thin Film Phenomena
- Advanced Chemical Sensor Technologies
- Radiative Heat Transfer Studies
- Advanced Sensor Technologies Research
- Advanced Research in Systems and Signal Processing
National University of Science and Technology
2023-2024
ITMO University
2016-2023
Lomonosov Moscow State University
2023
St Petersburg University
2020
Saint-Petersburg State University of Technology and Design
2020
A room-temperature terahertz (THz) detector based on a thermoelectric frequency selective surface (FSS) has been numerically simulated, designed, fabricated, and tested. The FSS fabricated from 150 nm thin Bi88Sb12 film with the engraved periodic Greek crosses. prototype tested under 0.14 THz radiation exposure showed voltage response due to photo-thermoelectric effect up 0.13–0.18 mV, responsivity equal 14–20 mV/W. shown three times higher in comparison continuous film. Thermal imaging...
We report results of galvanomagnetic and terahertz time-domain spectroscopy measurements on thin films Bi 1 − x Sb polyimide mica substrates with various antimony concentrations (x from 0 to 15 %) film thickness (70, 150 nm). The resistivity, Hall coefficient magnetoresistivity the were measured experimentally in magnetic field 0.65 T at room temperature. Mobility concentration electrons holes plane calculated using transport coefficients. is used measure complex conductivity permittivity...
We report a numerical study of the field assisted sintering silicon germanium alloys by finite element method, which takes into account contact resistances, thermal expansion and thermoelectric effect. The distribution electrical fields was analyzed numerically, based on experimental data collected from spark plasma (SPS) apparatus. properties Si-Ge used within simulation were considered as function density temperature. Quantitative estimation temperature during pointed to significant, up 60...
We report a machine learning (ML)-based approach allowing thermoelectric generator (TEG) efficiency evaluation directly from five parameters: two physical properties─carrier density and energy gap, three engineering parameters─external load resistance, TEG hot side temperature, leg height. Then, we use genetic algorithm to optimize these parameters maximize efficiency. To prepare data, properties of n- p-type materials were computed by coupling Density Functional Theory with Boltzmann...
A terahertz (THz) detector based on thermoelectric thin films was simulated using the finite elements method. The circuit consisted of S b and B i 88 12 150-nm mica substrate. , mica-substrate properties have been measured experimentally in THz frequency range. model electromagnetic heating used order to estimate possible - contact. radiation power varied from 1 μ W 50 mW, range 0.3 0.5 THz. calculations showed a temperature difference up K, voltage 0.1 mV, responsivity several mVW − ....
Hyperbolic medium is a special class of strongly anisotropic materials described by diagonal permittivity tensor with the principal components being opposite signs, which results in hyperbolic shape isofrequency contours. These media support propagating electromagnetic waves extremely large wave vectors exhibiting unique optical properties and applications such as negative refraction, subwavelength imaging, radiative heat transfer manipulation, enhancing spontaneous emission rate (Purcell...
The terahertz frequency range is promising for solving various practically important problems. However, the technology development, there still a problem with lack of affordable and effective devices. One main tasks to search new materials high sensitivity radiation at room temperature. Bi1−xSbx thin films Sb concentrations seem be suitable such conditions. In this paper, influence onto properties thermoelectric 200 nm was investigated first time. were obtained by means thermal evaporation...
Terahertz (THz) filters and detectors can find a wide application in such fields as: sensing, imaging, security systems, medicine, wireless connection, detection of substances. Thermoelectric materials are promising basis for THz detectors’ development due to their sensitivity the radiation, possibility be heated under radiation produce voltage Seebeck effect. thin films Bi-Sb solid solutions semimetals/semiconductors with band gap comparable energy high thermoelectric conversion efficiency...
Abstract The hyperbolic materials are strongly anisotropic media with a permittivity/permeability tensor having diagonal components of different sign. They combine the properties dielectric and metal-like described isofrequency surfaces in wave-vector space. Such may support unusual effects like negative refraction, near-field radiation enhancement nanoscale light confinement. were demonstrated mainly for microwave infrared frequency ranges on basis metamaterials natural correspondingly. For...
АннотацияПредмет исследования.Методами численного моделирования исследована закономерность диффузионных процессов в реакционных тиглях системы железо-олово при их электротермической обработке.Изучено влияние плотности тока и температуры на процессы тепло-и массопереноса реакционной зоне.Метод
We report the machine learning (ML)-based approach allowing thermoelectric generator (TEG) efficiency evaluation directly from 5 parameters: 2 physical properties - carriers density and energy gap, 3 engineering parameters external load resistance, TEG hot side temperature leg height. Then, we propose to use genetic algorithm optimize proposed in a way maximize efficiency. To prepare data, of n- p-type materials were computed by coupling Density Functional Theory Boltzmann Transport, used...
Abstract We studied the line of bismuth and antimony thin films obtained by thermal evaporation with or without additional annealing zone recrystallization under a coating. The dependence film structure on production technology substrate type has been shown. galvanomagnetic properties investigated.
We report on the production of 200 and 600 nm thick Bi films mica substrate with 10 Sb sublayer between mica. Two types have been studied: block single crystal. Films were obtained using thermal evaporation technique continuous discrete spraying. Discrete spraying allows smaller film blocks size: 2-6 μ m compared to 10-30 m, by Single crystal made zone recrystallization method. Microscopic examination without did not reveal an essential distinction in structure. A galvanomagnetic study shows...
The measurement of thermal conductivity by the method steady-state thermoreflectance is based on effect heating sample laser radiation. power reflected radiation from measured using an additional probe laser. change in reflection coefficient studied material due to proportional temperature. absorbed acts as a volumetric heat source. value calculated according Fourier’s law conductivity. A setup requires calibration, i.e., reference samples. calibration coefficient, turn, depends...