Modeling Optical Characteristics of Multilayer Nanoparticles of Different Sizes for Applications in Biomedicine

Bulavinets, Tetiana; Yaremchuk, Iryna; Bobitski, Yaroslav

doi:10.1007/978-3-319-30737-4_9

Cited by 13 publications

(3 citation statements)

References 20 publications

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“…The most often it is silver, gold, copper and aluminum. The micro-and nanostructures have wide practical applications and as a result, the computer numerical experiments of the interaction of electromagnetic radiation with metal nanoparticles [1][2][3], as well as micro-and nanograting, which contain metals, are carried out [4][5][6][7]. However, the fabrication of the periodic nanostructures is rather complicated technologically.…”

Section: Introductionmentioning

confidence: 99%

“…Computer simulations are most often used for calculations of spectral dependences of reflection, transmission and absorption coefficients for gratings structures [5,6], and the absorption and scattering cross-sections for metallic nanoparticles [1,2]. It has been shown experimentally that the resonance of localized surface plasmons in aluminum nanoparticles is observed in the ultraviolet region [2,8], the plasmon resonance is detected approximately at the wavelength of 0.42 μm in case of silver nanoparticles [3], at the wavelength of 0.52 μm [9] in case of gold nanoparticles, and plasmon resonance of copper nanoparticless is shifted to the long wave region, and appears about 0.65 μm [10].…”

Section: Introductionmentioning

confidence: 99%

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Analytical expressions for spectral dependences of silver, gold, copper and aluminum dielectric permittivity

Fitio¹,

Yaremchuk²,

Vernyhor³

et al. 2020

Optica Applicata

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In this work, the analytical expressions describing experimental data of silver, gold, copper and aluminum dielectric permittivity in a wide spectral range are presented. A comparison of samples production techniques, the measurement methods and the experimental data of different authors led to the conclusion that the most valid data are given by McPeak et al. (ACS Photonics 2(3), 2015, pp. 326–333) and Babar et al.(Appl. Opt. 54(3), 2015, pp. 477–481), which are close to each other. Thus, the analytical expressions for silver, gold, copper and aluminum dielectric permittivity spectral dependences are based on it. The spectral range in which the dielectric permittivity is represented by the corresponding analytical expression is divided into several intervals. There is a specific function for each wavelength range.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical expressions for spectral dependences of silver, gold, copper and aluminum dielectric permittivity

Fitio¹,

Yaremchuk²,

Vernyhor³

et al. 2020

Optica Applicata

View full text Add to dashboard Cite

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“…e -діелектричні проникності навколишнього середовища і частинки відповідно; r -радіус частинки.У разі плазмонного резонансу спостерігається різке збільшення перерізів поглинання і розсіяння частинок, які зв'язані із поляризованістю d виразами: k -хвильове число.Детальніше алгоритм моделювання перерізів поглинання та розсіяння електромагнітного випромінювання плазмонними сферичними частинками, використаний для розрахунку, описано у наших попередніх роботах[11,12].Оптичний відгук частинок еліпсоїдної форми з півосями a , b та c описується хвильовим рівнянням потенціалу в еліптичних координатах. У випадку, коли c b a ¹ ¹, еліпсоїд описується трьома значеннями поляризованості, залежно від орієнтації електромагнітного поля вздовж кожної осі: де i = 1, 2, 3 -індекс, що відповідає орієнтації електромагнітного поля вздовж півосей a , b та c ; L -геометричний фактор, що визначається як:…”

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Simulation of plasmon properties of copper monosulphide particles in the nir range

Melnykov,

Bulavinets,

Stakhira

et al. 2023

ICTEE

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This paper is devoted to the theoretical study of the extinction spectra of copper monosulfide particles under conditions of localized surface plasmon resonance. The study was conducted for plasmonic copper monosulfide particles of spherical and ellipsoidal shapes of variable size in media with different values of the refractive index. The simulation results reveal that increasing the radius of CuS nanoparticles leads to a significant enhancement in the amplitude of the plasmon peak and a shift of the peak towards longer wavelengths. It was investigated how the positions of the extinction peaks on the spectral scale and their amplitudes change when the particles deviate from the spherical shape. Simulations were performed for spherical and elongated ellipsoidal particles with fixed cross-sectional radius and variable length. Specifically, we varied the length of the major axis while keeping the lengths of the minor axes constant. It is shown that the deviation from the sphericity of the particles will affect both the position of the extinction maximum on the spectral scale and the shape of the spectral curve. An increase in the ratio of the ellipsoid semi-axes lengths leads to a significant increase in the amplitude of the extinction peak and its shift to the long-wavelength region. Besides, the position of the plasmonic peak on the spectral scale is influenced not only by the geometric parameters of the particles such as size and shape but also by the dielectric properties of the surrounding medium, including its refractive index. We assess the impact of changing the refractive index of the surrounding medium on the shape, amplitude, and position of the extinction maxima of CuS nanoparticles. It is showed that increasing the refractive index of the surrounding medium leads to a significant shift of the plasmon resonance peak into the long-wavelength region of the spectrum an increase in the peak width, and a decrease in its amplitude. Thus, ellipsoid copper monosulfide particles show improved surface plasmon characteristics compared to spherical ones and can be effectively used in the near-infrared spectral region.

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Core–Shell Nanostructures Under Localized Plasmon Resonance Conditions

Yaremchuk

Bulavinets

Fitio

et al. 2020

Springer Proceedings in Physics

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Modeling Optical Characteristics of Multilayer Nanoparticles of Different Sizes for Applications in Biomedicine

Cited by 13 publications

References 20 publications

Analytical expressions for spectral dependences of silver, gold, copper and aluminum dielectric permittivity

Analytical expressions for spectral dependences of silver, gold, copper and aluminum dielectric permittivity

Simulation of plasmon properties of copper monosulphide particles in the nir range

Core–Shell Nanostructures Under Localized Plasmon Resonance Conditions

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