Landau broadening of plasmonic resonances in Mie theory
Optics Express. 2020. Vol. 45. No. 9. P. 2644-2647.
Ikhsanov R., Protsenko I. E., Smetanin I. V., Uskov A. V.
Landau damping in the metal nanosphere is considered beyond the quasi-static approximation with the use of exact Mie theory when an incident plane wave can excite not only the dipole mode but also higher order modes. In resonance approximation, when one considers excitation of a single-mode, the analytical formula for the Landau damping coefficient for various modes have been derived. It was demonstrated that the simultaneous excitation of several eigenmodes, which are overlapped in the frequency domain, can lead to substantial correction of the Landau damping coefficients for the modes.
Research target: Physics
Priority areas: engineering science
, , Успехи физических наук 2019 Т. 189 № 3 С. 282-291
The main results obtained recently at the Laboratory of Laser Spectroscopy, Institute of Spectroscopy of the Russian Academy of Sciences in researching and developing various 2D optical elements for surface plasmon waves and their characterization using near-and far-field methods are presented. They include an optical medium for plasmon waves, a plasmon interferometer, a parabolic mirror ...
Added: December 20, 2019
Усиление комбинационного рассеяния света в субволновых плазмонных наноструктурах, полученных методом ионно-лучевой литографии
, , et al., Кристаллография 2014 Т. 59 № 1 С. 137-144
By using ion-beam lithography we have obtained subwavelength grating with optimized architecture corresponding to the spectral position of the resonances at desired wavelengths. Structural and optical properties of the obtained nanostructures were investigated. Signal intensity of Raman scattering from molecules of substances adsorbed on the surface gratings with optimized architecture increased to 10 000 ...
Added: February 20, 2014
Second harmonic generation by metal core - dielectric shell spherical nanoparticles: spatial vs. plasmon resonances
, , , Journal of Physics: Conference Series 2018 Vol. 1124 No. 5 P. 051028
An analytical study of the second harmonic generation by metal core - dielectric shell spherical nanoparticles was performed. Dependences of the second harmonic intensity on the dielectric shell thickness were calculated. We demonstrated that the thin coating allows tuning surface plasmon resonance wavelength, whereas in presence of the thick shell spatial Mie resonances occur. Estimated ...
Added: December 9, 2020
Understanding the Second-Harmonic Generation Enhancement and Behavior in Metal Core–Dielectric Shell Nanoparticles
, , Journal of Physical Chemistry C 2018 Vol. 122 No. 27 P. 15635-15645
To explain recently observed up to 50-fold enhancement of the second harmonic (SH) signal from gold nanoparticles after depositing of a thin dielectric layer, we perform an analytical study of the SH generation by metal core-dielectric shell spherical nanoparticles (NPs). We derive analytical expressions for the SH intensity accounting for electric dipole and quadrupole impacts. ...
Added: December 9, 2020
Effect of SiO2 nanoparticles embedded in the electrode layer on the efficiency of organic solar cells
, , et al., Optical Materials Express 2021 Vol. 11 No. 5 P. 1537-1545
The effect of spherical SiO2 nanoparticles (NPs) embedded in the electrode layer of PEDOT:PSS on the efficiency of organic solar cells (OSC) based on small molecules was studied in detail. We show that embedding SiO2 NPs of 50 nm in diameter increases the power conversion efficiency (PCE) by 15%, and this increase weakly depends on ...
Added: July 1, 2021
Nonresonant Local Fields Enhance Second-Harmonic Generation from Metal Nanoislands with Dielectric Cover
, , et al., Physical Review Letters 2018 Vol. 120 No. 11 P. 113902
We study second-harmonic generation from gold nanoislands covered with amorphous titanium oxide (TiO2) films. As the TiO2 thickness increases, the plasmon resonance of the nanoislands shifts away from the second-harmonic wavelength of 532 nm, diminishing the resonant enhancement of the process at this wavelength. Nevertheless, the second-harmonic signal is enhanced by up to a factor of ...
Added: December 9, 2020
Fine characteristics of polarization singularities in a three-dimensional electromagnetic field and their properties in the near field of a metallic nanospheroid
, , et al., Physical Review A: Atomic, Molecular, and Optical physics 2018 Vol. 98 No. 6 P. 063805-1-063805-8
Isotropy parameters of truly linear (LT ) and truly circular (CT ) polarization singularities in a threedimensional monochromatic electromagnetic field are defined. It is demonstrated that these parameters characterize the distribution of polarization ellipses near the singular points in a more detailed way than a topological index. A numerical algorithm which tracks CT and LT ...
Added: February 1, 2019
The Effect of a Silicon Substrate on the Directivity Pattern of Scattered Radiation of a Gold Nanospheroid and on Near-Field Polarization
, , , Moscow University Physics Bulletin 2017 Vol. 72 No. 6 P. 544-549
We studied the radiation-directivity pattern and the near-field polarization of a spheroidal metallic nanoparticle located over a silicon substrate by interaction with a linearly and circularly polarized field. It is shown that the directivity pattern of the spheroidal particle near the silicon substrate becomes strongly asym- metric and forward scattering is predominant compared with the ...
Added: February 1, 2019
, Physica Status Solidi RRL 2015 Vol. 9 No. 10 P. 570-574
Transition absorption of a photon by an electron passing through a boundary between two media with different permittivities is described both classically and quantum mechanically. Transition absorption is shown to make a substantial contribution to photoelectron emission at a metal/semiconductor interface in nanoplasmonic systems, and is put forth as a possible microscopic mechanism of the surface photoelectric effect in photodetectors and solar ...
Added: September 27, 2015
Resonance fluorescence of a two-level quantum emitter near a plasmonic nanoparticle: Role of the near-field polarization
, , , Laser Physics 2017 Vol. 27 No. 2 P. 1-10
It is demonstrated that the interaction of a two-level quantum emitter (atom, molecule, etc) with a plasmonic nanoparticle (prolate nanospheroid) in an external laser field features either an essential increase (up to a few orders of magnitude) or reduction (up to a few times) of the total decay rate of the emitter in specific areas around the nanoparticle ...
Added: February 1, 2019
, , , Laser Physics Letters 2020 Vol. 17 No. 4 P. 045901
In this paper we present measurements and comparison of SPP propagation length at the practically important telecom wavelength (1560 nm) as well as in the near-infrared and visible spectral ranges. The measurements were carried out for plane SPP waves excited on Ag film surface using optical microscopy of SPP waves in the far field. We ...
Added: January 15, 2021
, , et al., Journal of the American Ceramic Society 2019 Vol. 102 No. 5 P. 2745-2751
Single crystal of TlCl was doped with NIR photoluminescent univalent bismuth cations by prolonged immersion in liquid bismuth metal. The ion exchange Tl+ + Bi0 ↔ Tl0 + Bi+ at the crystal surface with subsequent Bi+ migration to the bulk are expected to drive the doping process. Contrary with Bi‐doped TlCl crystals, grown by Bridgman method, the ion exchange does ...
Added: February 8, 2019
, , Polymer Science - Series C 2018 Vol. 60 No. Supplement 1 P. 148-159
Theoretical models of the conformational behavior of flexible polymer chains in mixed solvents enunciated in the world literature during the last decade are critically reviewed. Models describing different mechanisms of coil-to-globule transitions in a good solvent induced by cosolvent addition are highlighted. Special attention is given to the analysis of theoretical approaches to describing the ...
Added: November 30, 2018
, , et al., IOP Conference Series: Materials Science and Engineering (MSE) 2020 Vol. 781 No. 1 P. 012011-1-012011-5
Spectral characteristics of WSi and NbN superconducting single-photon detectors with different surface resistance and width of nanowire strips have been investigated in the wavelength range of 1.3-2.5 µm. WSi structures with narrower strips demonstrated better performance for detection of single photons in longer wavelength range. The difference in normalized photon count rate for such structures ...
Added: December 10, 2020
М. : National Instruments Russia, 2017
Содержание сборника составляют доклады с результатами оригинальных исследований и технических решений, ранее не публиковавшиеся. Мы надеемся, что предлагаемый сборник окажется полезным для специалистов, работающих в различных областях науки и техники, для широкого круга преподавателей, аспирантов и студентов ВУЗов, а также для преподавателей средних школ и технических колледжей. ...
Added: May 10, 2017
Сканирующий безапертурный микроскоп ближнего оптического поля - прибор для исследования оптических свойств поверхности с нанометровым разрешением
, , et al., Известия РАН. Серия физическая 2017 Т. 81 № 12 С. 1709-1714
Описаны принципы работы безапертурного сканирующего микроскопа ближнего оптического поля (ASNOM). Зондом в приборе служит металлизированная игла атомно-силового микроскопа, и оптическое взаимодействие с объектами на поверхности локализовано вблизи ее острия размером в несколько нанометров. Тело иглы имеет длину в несколько микрон, и это обеспечивает высокую эффективность ее электромагнитного взаимодействия с падающими на нее извне и излучаемыми ...
Added: December 6, 2020
Temperature distribution in driven granular mixtures does not depend on mechanism of energy dissipation
, , , Scientific Reports 2020 Vol. 10 Article 693
We study analytically and numerically the distribution of granular temperatures in granular mixtures for different dissipation mechanisms of inelastic inter-particle collisions. Both driven and force-free systems are analyzed. We demonstrate that the simplified model of a constant restitution coefficient fails to predict even qualitatively a granular temperature distribution in a homogeneous cooling state. At the same time we reveal ...
Added: February 25, 2020
, , Materials Letters 2017 Vol. 206 P. 64-66
To obtain a correct estimate of the microhardness dependence on the size of nanocrystals, the microhardness of amorphous-nanocrystalline samples with the same fraction of the crystalline phase and the same composition of the amorphous matrix but different sizes of nanocrystals was studied. It is shown that the dependence of microhardness on the nanocrystal size in the size range ...
Added: February 22, 2018
Intrinsic arrested nanoscale phase separation near a topological Lifshitz transition in strongly correlated two-band metals
, , et al., Superconductor Science and Technology 2015 Vol. 28 No. 2 P. 024005-1-024005-8
The arrested nanoscale phase separation in a two-band Hubbard model for strongly correlated charge carriers is shown to occur in a particular range in the vicinity of the topological Lifshitz transition, where the Fermi energy crosses the bottom of the narrow band and a new sheet of the Fermi surface related to the charge carriers ...
Added: March 12, 2016
Electronic band structure of phosphorus-doped single crystal diamond: Dynamic Jahn-Teller distortion of the tetrahedral donor ground state
, , et al., Physical Review B: Condensed Matter and Materials Physics 2020 Vol. 102 P. 115153-1-115153-10
The electronic band structure of the phosphorus-doped high-quality high-pressure and high-temperature– grown single crystal diamond was studied by infrared absorption, magneto- and electron paramagnetic resonance spectroscopy, and first-principles calculations. The complete picture of the 1s → np± and 1s → np0 (n = 2, 3, 4) donor transitions with new 1s →3p0,4p0 and 1s →4p± transitions allowed us ...
Added: October 22, 2020
, , et al., Physical Review B: Condensed Matter and Materials Physics 2019 Vol. 99 No. 4 Article 045305
The integer quantum Hall effect is a well-studied phenomenon at frequencies below about 100 Hz. The plateaus in high-frequency Hall conductivity were experimentally proven to retain up to 33 GHz, but the behavior at higher frequencies has remained largely unexplored. Using continuous-wave terahertz spectroscopy, the complex Hall conductivity of GaAs/AlGaAs heterojunctions was studied in the ...
Added: December 11, 2020
, , et al., Физика и химия обработки материалов 2017 № 6 С. 5-17
Изучено влияние облучения в установке Плазменный фокус PF-1000 экстремальными энергетическими потоками быстрых ионов дейтерия (Ei≈100 кэВ, плотность мощности qi≈1011-1012 Вт/см2, длительность импульса ti≈10-50 нс) и дейтериевой плазмы (qpl≈109- 1010 Вт/см2, tpl≈50-100 нс) на структуру поверхностного слоя молибденовой пластины с учетом его плавления, частичного испарения и закалки расплава. На облученной поверхности обнаружено образование капельных структур, пор, ...
Added: December 25, 2017
M. : Faculty of Physics, MSU, 2017
The Low Temperature Physics Conference is an international event held every three years, under the auspices of the IUPAP through its Commission C5 on Low Temperature Physics. The aim of these conferences is to exchange information and views among the members of the international scientific community in the general field of Low Temperature Physics. It ...
Added: October 1, 2017
, , Международный журнал экспериментального образования 2014 № 1 С. 98-101
Devices of nanorelocation with the probes, the executing operations necessary for formation of quantum points are developed. Options of execution of devices are shown. ...
Added: January 20, 2014