Effect of optical sensitisation on a surface plasmon resonance

Vinogradov, S. V.; Kononov, M. A.; Savranskiĭ, V. V.; Valyanskii, S. I.; Urbaitis, M F

doi:10.1070/qe2003v033n08abeh002483

Cited by 5 publications

(3 citation statements)

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“…The presence of enhancement of local fields in metal nanoparticles caused by SPR can significantly increase the efficiency of solar cells, create a new elemental base for the means of information transmitting and processing [1]. In addition, this resonance interaction is accompanied by a number of nonlinear optical effects, such as increased light absorption efficiency, enhance-ment of luminescence, Raman scattering as well as others that have been successfully used to enhance the resolution of microscopes [2], precision drug transportation and treatment of tumor diseases [3]. It is known that location of the SPR band is significantly influenced by the shape of nanoparticles and dielectric properties of the environment (dielectric matrix) [4].…”

Section: Introductionmentioning

confidence: 99%

Width of the surface plasmon resonance line in spherical metal nanoparticles

Biliuk¹,

Semchuk²,

Havryliuk³

2020

SPQEO

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In recent years, there has been increasing interest in the study of the optical properties of metallic nanostructures. This interest is primarily related to the practical application of such nanostructures in quantum optical computers, micro-and nanosensors. These applications are based on the fundamental optical effect of excitation of surface plasmons. Surface plasmons are electromagnetic excitations of electron plasma of metals at the metal-dielectric interface, which are accompanied by fluctuations in the surface charge density. The consequence of this phenomenon is surface plasmon resonance (SPR)an increase in the energy absorption cross-section of a metal nanoparticle as the incident light frequency (laser irradiation) approaches to the frequency of the nanoparticle SPR. The SPR frequency for metallic nanoparticles in a dielectric matrix  m is found. Light-excited plasmon vibrations of conduction electrons in metallic nanoparticles located in a dielectric matrix will eventually attenuate due to various relaxation processes, in particular due to interaction of the conduction electrons with the crystal lattice (electron-phonon interaction) or due to electron-electron interaction at the surface of the nanoparticles, when the average free electron path in the nanoparticles exceeds its size. It defines the natural width of SPR line. It has been shown that oscillations of the SPR line width can be observed in metallic nanoparticles with a change in the dielectric constant of the medium in which they are. The oscillations are well expressed in nanoparticles with smaller radii and disappear for nanoparticles of larger radii. The magnitude of these oscillations increases with decreasing the nanoparticle radius and increases markedly with increasing the dielectric constant of the environment.

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Section: Introductionmentioning

confidence: 99%

Width of the surface plasmon resonance line in spherical metal nanoparticles

Biliuk¹,

Semchuk²,

Havryliuk³

2020

SPQEO

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“…The coherent soft-x-ray sources with the wavelength λ ∼ 0.1 − 50 nm are required in many areas of science and technology [1][2][3][4]. One of the most practical soft x-ray lasers is currently considered to be based on the 46.9-nm line of neon-like argon (Ar +8 ) produced in a hot (T ∼ 100 eV) and dense (N ∼ 10 18 cm −3 ) plasma in a capillary discharge z-pinch [5][6][7][8][9][10][11][12][13][14]. In the laser pumping scheme, a hot and highly ionized plasma active medium with diameter of ∼ 500 μm is produced by high-current electric pulses with short rise-time (few tens of nanoseconds) flowing axially through a low-pressure Ar gas-filled capillary channel.…”

Section: Introductionmentioning

confidence: 99%

“…It was recognized [15] that a laser beam with such parameters probably could be obtained directly by using a relatively low voltage (100 kV ≤ U ≤ 200 kV) and peak current (10 kA ≤ I ≤ 20 kA). In the last few years, considerable efforts have been devoted to reduction of the laser size from the laboratory size to the table-top [6][7][8][9][10][11][12][13][14]. Laser amplification in the most compact and effective table-top Ar +8 -laser [15] was obtained in a short (L ∼ 20 cm) aluminum oxide ceramic capillary 3.2 mm inside diameter filled with pre-ionized Ar gas at pressure ∼ 0.9 mbar.…”

Section: Introductionmentioning

confidence: 99%

Critical Parameters of the Pumping Scheme of Ar⁺⁸ Lasers Excited by Z Pinches in Long Capilaries

Szasz

Kiss

Sánta

et al. 2012

Contrib. Plasma Phys.

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The present study is focused on the demonstration of the most critical parameters of the pumping scheme of a table-top Ar +8 -laser excited by discharges with relatively low current and voltage (I ≤ 20 kA, U ≤ 200 kV) in long (L ∼ 0.5 m) capillaries. The most critical parameters of the pumping scheme were analyzed and then adjusted experimentally. The table-top size is attributed to the use of a low-inductance co-axial discharge configuration that decreases the voltage and current necessary for laser excitation. Low inductance is achieved by using a capillary, water-capacitor and water spark-gap placed into a chamber filled with deionized water. The capillary z-pinch is produced by the water capacitor, which is pulse-charged by a six-stage Marx generator, optimized for the low-inductance discharge configuration. Optimization is performed by adjusting the value of the charging inductance and the peak charging voltage with a water spark-gap. At the optimal conditions laser pulses with a Gaussian-like intensity distribution and divergence angle ∼ 1 mrad and energy ∼ 10 μJ are generated. The physical method for generation of a laser beam with such parameters is based on the use of a long (L = 0.45 m) capillary plasma.

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Plasmonic spectroscopy of the water solutions of the copper phthalocyanine adsorbed on silver surface

Kononov

Pustovoy

Svetikov

et al. 2018

2018 IEEE Conference of Russian Young Researchers in Electrical and Electronic Engineering (EIConRus)

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Effect of optical sensitisation on a surface plasmon resonance

Cited by 5 publications

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Width of the surface plasmon resonance line in spherical metal nanoparticles

Width of the surface plasmon resonance line in spherical metal nanoparticles

Critical Parameters of the Pumping Scheme of Ar⁺⁸ Lasers Excited by Z Pinches in Long Capilaries

Plasmonic spectroscopy of the water solutions of the copper phthalocyanine adsorbed on silver surface

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Effect of optical sensitisation on a surface plasmon resonance

Cited by 5 publications

References 0 publications

Width of the surface plasmon resonance line in spherical metal nanoparticles

Width of the surface plasmon resonance line in spherical metal nanoparticles

Critical Parameters of the Pumping Scheme of Ar+8 Lasers Excited by Z Pinches in Long Capilaries

Plasmonic spectroscopy of the water solutions of the copper phthalocyanine adsorbed on silver surface

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Product

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Critical Parameters of the Pumping Scheme of Ar⁺⁸ Lasers Excited by Z Pinches in Long Capilaries