Ivan Komarevtsev
Research Subjects
Ivan Komarevtsev has a total of 46 co-authors. Here are the top co-authors by number of shared publications:
- Yakov Enns
Alferov University
4 shared publications - Andrey V. Korshunov
Alferov University
3 shared publications - Roman Kleimanov
Alferov University
3 shared publications - Alexey Kazakin
Alferov University,St. Petersburg,Russia
2 shared publications - Anastasia Kondrateva
Alferov University, Khlopin St. 8/3, St. Petersburg, Russia
2 shared publications Alexander Efimovich Gorodetsky
Institut fiziceskoj himii i elektrohimii imeni A N Frumkina RAN, Moskva, RUSSIAN FEDERATION
1 shared publication
Latest Publications
- 19 October 2023
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 272-274
Effect of Gold Nanoparticle Size on the Properties of Etched Silica Pillars
In this paper, we propose a method for the formation of efficient photoconverters which optical band gap decreases due to the introduction of impurities (gold nanoparticles) into the oxide. Gold nanoparticles can act both as noticeable levels in the band gap and as plasmonic particles. The use of 2D geometry in this case allows you to significantly increase the effective transformation surface. Photo-induced current transfer through nanocomposite structures consisting SiO 2 layers activated with gold nanoparticles (AuNP) are under investigation. AuNPs are situated on top of SiO 2 nano-pillars. Nano-pillar array with AuNPs is prepared by previously described two-step technique using plasma etching. Optical and electric characteristics of these structure are investigated.
- 19 October 2023
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 272-274
Effect of Gold Nanoparticle Size on the Properties of Etched Silica Pillars
In this paper, we propose a method for the formation of efficient photoconverters which optical band gap decreases due to the introduction of impurities (gold nanoparticles) into the oxide. Gold nanoparticles can act both as noticeable levels in the band gap and as plasmonic particles. The use of 2D geometry in this case allows you to significantly increase the effective transformation surface. Photo-induced current transfer through nanocomposite structures consisting SiO 2 layers activated with gold nanoparticles (AuNP) are under investigation. AuNPs are situated on top of SiO 2 nano-pillars. Nano-pillar array with AuNPs is prepared by previously described two-step technique using plasma etching. Optical and electric characteristics of these structure are investigated.
- 20 October 2022
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 234-237
Surface Modification of a Metal Oxide Thin Film with Dewetted Au Nanoparticles
The purpose of this work is to develop a technology for the formation of the surface of transition metal oxides by plasmonic activators. The technology consisting of magnetron sputtering of an oxide film, thermal evaporation of noble metal nanoparticles and dewetting is briefly considered. The materials under study were gold layers of various thicknesses, nickel and titanium oxides. The paper demonstrates the main regularities of dewetting of plasmonic gold nanoparticles on the surfaces of nickel and titanium oxides and shows that one of the key parameters is the wetting angle. This conclusion makes it possible to expand the possibilities of controlling the size of nanoparticles during dehydration by choosing the substrate material. The formed materials can be used as active media of various optoelectronic devices.
- 20 October 2022
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 234-237
Surface Modification of a Metal Oxide Thin Film with Dewetted Au Nanoparticles
The purpose of this work is to develop a technology for the formation of the surface of transition metal oxides by plasmonic activators. The technology consisting of magnetron sputtering of an oxide film, thermal evaporation of noble metal nanoparticles and dewetting is briefly considered. The materials under study were gold layers of various thicknesses, nickel and titanium oxides. The paper demonstrates the main regularities of dewetting of plasmonic gold nanoparticles on the surfaces of nickel and titanium oxides and shows that one of the key parameters is the wetting angle. This conclusion makes it possible to expand the possibilities of controlling the size of nanoparticles during dehydration by choosing the substrate material. The formed materials can be used as active media of various optoelectronic devices.
- 20 October 2022
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 268-271
Fabrication of Cesium Vapor Cells for Chip-Scale Atomic Clock Based on Coherent Population Trapping
The article presents the results of the development, fabrication and investigation of miniature cesium vapor cells for quantum frequency standards with optical pumping, working on the effect of coherent population trapping. Microelectromechanical systems technologies were used in the manufacture of cells. For the first time, the dry silicon etching in inductively coupled plasma of sulfur hexafluoride and freon gas in a mixed mode was used to form internal cavities of cells with a thickness of 1.5 mm. Vacuum-tight sealing of cells containing a solid-state source of cesium vapor and buffer gas was carried out by anodic bonding of glass and silicon in a neon atmosphere. The coherent population trapping signal with a linewidth of 750 Hz and a signal-to-noise ratio of 1190 in the 1-Hz bandwidth was observed. Experimental results show that these microcells are appropriate for applications to atomic clock with a relative frequency stability of $6\cdot 10^{-11}$ at 1 s.- 20 October 2022
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 268-271
Fabrication of Cesium Vapor Cells for Chip-Scale Atomic Clock Based on Coherent Population Trapping
The article presents the results of the development, fabrication and investigation of miniature cesium vapor cells for quantum frequency standards with optical pumping, working on the effect of coherent population trapping. Microelectromechanical systems technologies were used in the manufacture of cells. For the first time, the dry silicon etching in inductively coupled plasma of sulfur hexafluoride and freon gas in a mixed mode was used to form internal cavities of cells with a thickness of 1.5 mm. Vacuum-tight sealing of cells containing a solid-state source of cesium vapor and buffer gas was carried out by anodic bonding of glass and silicon in a neon atmosphere. The coherent population trapping signal with a linewidth of 750 Hz and a signal-to-noise ratio of 1190 in the 1-Hz bandwidth was observed. Experimental results show that these microcells are appropriate for applications to atomic clock with a relative frequency stability of $6\cdot 10^{-11}$ at 1 s.- 9 February 2022
- Published by IOP Publishing in Nuclear Fusion
Large-scale collecting mirrors for ITER optical diagnostic
The challenges of large-scale mirror design for in-vessel collection system of ITER Divertor Thomson Scattering (DTS) are under consideration. These are the mirrors located out-of-line vision of fusion plasma (so called “second mirrors” i.e. not First Mirrors) with high-reflective Ag-based coating. The paper outlines: approaches providing optical surface shape and angular position stability; Ag coating applicability in nuclear irradiation, ITER in-vessel application and its resistance to Steam Ingress. Although, this assessment and the proposed solutions are considered in terms of ITER DTS compatibility, they may also appear to be of some use in other ITER diagnostics and in diagnostics of other fusion devices.
- 9 February 2022
- Published by IOP Publishing in Nuclear Fusion
Large-scale collecting mirrors for ITER optical diagnostic
The challenges of large-scale mirror design for in-vessel collection system of ITER Divertor Thomson Scattering (DTS) are under consideration. These are the mirrors located out-of-line vision of fusion plasma (so called “second mirrors” i.e. not First Mirrors) with high-reflective Ag-based coating. The paper outlines: approaches providing optical surface shape and angular position stability; Ag coating applicability in nuclear irradiation, ITER in-vessel application and its resistance to Steam Ingress. Although, this assessment and the proposed solutions are considered in terms of ITER DTS compatibility, they may also appear to be of some use in other ITER diagnostics and in diagnostics of other fusion devices.
- 1 January 2022
- Published by Springer Nature
- p. 221-227
Aerosol Transport Modeling for Evaporator of CVD Reactor
- 1 January 2022
- Published by Springer Nature
- p. 221-227
Aerosol Transport Modeling for Evaporator of CVD Reactor
- 1 January 2022
- Published by Springer Nature
- p. 229-234
Numerical Simulation of CVD Reactor for Oxide Semiconductor Layer Deposition
- 1 January 2022
- Published by Springer Nature
- p. 229-234
Numerical Simulation of CVD Reactor for Oxide Semiconductor Layer Deposition