A5031176891- Advanced Semiconductor Detectors and Materials
- Advanced Optical Sensing Technologies
- Terahertz technology and applications
- Thermography and Photoacoustic Techniques
- Calibration and Measurement Techniques
- Radiation Detection and Scintillator Technologies
- Semiconductor Quantum Structures and Devices
- Advanced Thermoelectric Materials and Devices
- Quantum Information and Cryptography
- Photonic and Optical Devices
- nanoparticles nucleation surface interactions
- Advanced Thermodynamics and Statistical Mechanics
- Advanced Materials Characterization Techniques
- Thermal Radiation and Cooling Technologies
- Superconducting and THz Device Technology
- Rare-earth and actinide compounds
- Thermal properties of materials
- Topological Materials and Phenomena
- Mechanical and Optical Resonators
- Nanoparticles: synthesis and applications
- Laser-induced spectroscopy and plasma
- Integrated Circuits and Semiconductor Failure Analysis
- Infrared Target Detection Methodologies
- Quantum many-body systems
- Laser-Ablation Synthesis of Nanoparticles
Institute for Physical Research
2016-2025
National Academy of Sciences of Armenia
2013-2024
Russian-Armenian University
2023
University of California, Los Angeles
2022
Abstract We report the synthesis of iron oxide nanoparticles using solution combustion synthesis, focusing on controlled manipulation material characteristics, such as particle size, phase composition, and magnetic properties, by applying external inert gas pressure. It was shown that variation nitrogen pressure in reactor range 0.1 to 1.1 MPa changed time-temperature history process resulted gradual change composition fabricated materials along FeO → FeO∙Fe 2 O 3 Fe route. The size varied...
In this paper we have proposed the design of a single-photon thermoelectric detector's detection pixel consisting heat sink (W), sensor (CeB <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> ), absorber and antireflection layer (SiO xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> ). It is justified that detector with such can provide for system efficiency above 90% photons energy 0.8-4 eV. Modeling simulation are used to study processes...
In this paper, we present the results of simulating heat propagation processes in thermoelectric detection pixel after absorbing single photons UV radiation with energies ranging from 7.1 to 124 eV. The pixels, an operating temperature 1 K, consist absorber (W), a sensor (La0.99Ce0.01B6), sink and substrate (Al2O3). transfer pixels different layer thicknesses surface areas were modeled simulated using three-dimensional matrix method for differential equations based on equation limited...
We present the results of modeling and simulation heat propagation processes taking place in SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /W/CeB xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> /W four-layer detection pixel a thermoelectric single-photon detector after simultaneous absorption two, three, four photons with energy 0.8 eV at different distances from each other as well many optical delay. Calculations were carried...
We have collected and analyzed the values of thermoelectric parameters materials on this basis calculated energy resolution photon count rate Thermoelectric Nanowire Single-Photon Detector (TNSPD). It is concluded that TNSPD can achieve higher specifications as compared with best single-photon detectors. The lanthanum-cerium hexaboride sensors are expected to reach more than gigahertz rates will a sensitivity 0.1 eV. means device sensitive enough register spectrally characterize not only...
The results of computer simulation heat distribution on the sensor Thermoelectric Single Photon Detector after photon absorption are presented in this work. kinetic processes emerging 100 eV (hard UV) and 1 KeV (X-ray) energy photons different areas absorber for geometries investigated. calculations were performed tungsten cerium hexaboride sensor. It is shown, that waveform time dependence response doesn't strongly depend from depth thermalization area height which temperature gradient...
The ability to detect a single photon is the ultimate level of sensitivity in measurement optical radiation. Sensors capable detecting photons and determining their energy have many scientific technological applications. Kondo-enhanced Seebeck effect cryogenic detectors are based on thermoelectric heat-to-voltage conversion voltage readout. We evaluate prospects CeB6 (La,Ce)B6 hexaboride crystals for application as sensitive element this type detectors. conclude that such can register UV...
The results of computer modeling the thermoelectric single-photon detector are presented. We observe processes heat distribution after absorption a photon 0.1-1 keV energy in different parts absorber for geometries absorbers and sensors. calculations were carried out by matrix method differential equations using parameters tungsten sensor made (La, Ce)B6. show that it is realistic to detect photons about determine their with accuracy not less than 1%. High count rates up 200 GHz can be achieved.
The factors determining the efficiency of target material utilisation for pulsed laser deposition films are considered. volume is calculated, which evaporated in ablation process by focused radiation having a rectangular form. new device suggested and developed obtaining thin method deposition, specific employment simple optical system mounted outside chamber that comprises two lenses diaphragm focuses beam onto form sector-like spot. Thin CuO YBaCuO were deposited with this device. Several...