Surface-plasmon-enhanced radiation effects in confined photonic systems

Shubin, V. A.; Kim, W.; Safonov, V. P.; Sarychev, Andrey K.; Armstrong, R. L.; Shalaev, Vladimir M.

doi:10.1109/50.803009

Cited by 30 publications

(15 citation statements)

References 19 publications

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“…Apart from lasers, it has been widely used in many other fields such as surface plasmon (SP)-enhanced radiation [1], spontaneously generated coherence [2], chiral photonic liquid crystals and associated frequency tuning [3], and photonic crystals based on dyedoped holographic polymer-dispersed liquid crystal reflection gratings [4].…”

Section: Introductionmentioning

confidence: 99%

Ultra-Enhanced Lasing Effect of Plasmonic Lens Structured with Elliptical Nanopinholes Distributed in Variant Periods

Zhou

Zhu

2010

Plasmonics

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A plasmonic lens constructed with elliptical pinholes ranging from micron to nanoscales distributed in variant periods along the radial direction was presented. Our computational numerical calculation results demonstrated that an ultra-enhanced lasing effect exists while linear polarized plane wave illuminates and passes through the pinholes. The lasing effect can extend the longitudinal focal region and reach as long as 12 µm along the propagation direction. Benefiting from the lasing effect, depth of focus with extraordinarily elongated length (three orders of magnitude in comparison to that of the conventional microlenses) is generated accordingly. Undoubtedly, it may be helpful for practical applications such as data storage, photolithography, and bioimaging.

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Section: Introductionmentioning

confidence: 99%

Ultra-Enhanced Lasing Effect of Plasmonic Lens Structured with Elliptical Nanopinholes Distributed in Variant Periods

Zhou

Zhu

2010

Plasmonics

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“…In turn, the spectral position of the SPR absorption bands is determined by the size of the nanoparticles, their shape and internal structure, and also the dielectric properties of the matrix in which they are embedded [2]. The near field distribution is also sensitive to all these parameters [3][4][5][6][7]. In this case, for example, in order to increase the intensity of Raman scattering by molecules situated near the surface of metallic nanoparticles, spectral overlap of the absorption bands of the selected molecules and the SPR absorption bands is of fundamental importance.…”

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confidence: 98%

Effect of metallic nanoparticle sizes on the local field near their surface

Дынич

Ponyavina

2008

J Appl Spectrosc

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We have used numerical calculations based on Mie theory to analyze the near field distribution patterns for 4-150 nm spherical silver nanoparticles (nanospheres). We have shown that as the nanoparticle sizes increase, the region where "hot spots" are concentrated is shifted to the forward hemisphere. We have observed a nonmonotonic dependence of the maximum attainable local field enhancement factor on the size of the silver nanospheres. We have determined a correlation between the optimal nanosphere size for the maximum attainable local field enhancement factor and the optical absorption efficiency factor. We have established a nonmonotonic dependence of the optimal size of the nanoparticles and the maximum attainable local field enhancement factor on the refractive index of the surrounding medium.Introduction. Materials containing nanoparticles of noble metals are being actively studied today because of their important properties connected with formation of surface plasmon resonance (SPR) absorption bands in the visible region of the spectrum and substantial enhancement of local fields near the surface of the metallic nanoparticles ("hot spots"). Resonance enhancement of local characteristics of the optical field has a considerable effect on formation of linear and nonlinear optical properties of aggregated nanodispersed structures, and the extent to which these resonances appear can be effectively controlled by varying the topological and morphological parameters of the nanocomposites. Significant local field enhancement and its considerable nonuniformity are important factors leading to the appearance of "surface-enhanced" optical effects, such as surface-enhanced Raman scattering (SERS) and enhancement of the luminescence of molecules situated near the surface of metallic nanostructures.It has been established [1] that the local field enhancement effect is most significant near the SPR absorption bands of metallic nanoparticles. In turn, the spectral position of the SPR absorption bands is determined by the size of the nanoparticles, their shape and internal structure, and also the dielectric properties of the matrix in which they are embedded [2]. The near field distribution is also sensitive to all these parameters [3][4][5][6][7]. In this case, for example, in order to increase the intensity of Raman scattering by molecules situated near the surface of metallic nanoparticles, spectral overlap of the absorption bands of the selected molecules and the SPR absorption bands is of fundamental importance.In order to determine the optimal conditions for resonance local field enhancement by metallic nanospheres, in this work we have studied the topology of the near field distribution for silver nanoparticles of different sizes; we have established the characteristic localization scales for the local field enhancement regions; and we have also studied the dependence of the attainable values of the local field enhancement factor on the sizes of the silver nanoparticles and the properties of the dielectric environmen...

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“…Since fractal structures do not possess translational invariance, the traveling waves typical for a homogeneous medium can't spread on them. Moreover, the collective optical excitation in fractals such as surface plasmons, tend to spatial localization 24 , which potentially results in generation of more intense electromagnetic fields in the structures and in the gaps formed between the materials, socalled "hot spots" 25,26 . Analyte molecules can be adsorbed in the fractal space between the nanoparticles or in the SERS "hot spots".…”

Section: Introductionmentioning

confidence: 99%

Ag on carbon nanowalls mesostructures for SERS

Tsvetkov

Evlashin

Mironovich

et al. 2015

Photonics, Devices, and Systems VI

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We have elaborated substrates for surface enhanced Raman scattering (SERS) based on carbon nanowalls (CNW) deposited with Ag nanoparticles and thin Ag films. For carbon nanowalls deposited with silver nanoparticles, the achieved analytical enhancement factor SERS was from 50 to 2500.Much higher analytical enhancement factor of SERS, up to 5×10 4 , was obtained for carbon nanowalls deposited with thin Ag film. In this case the SERS signal is determined by fractal structure of carbon nanowalls covered by Ag films. Such fractal structure provides a strong inhomogeneous localization of light, formation of a large number of hot spots and leads as a result to significant enhancement of SERS signal.

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Surface-plasmon-enhanced radiation effects in confined photonic systems

Cited by 30 publications

References 19 publications

Ultra-Enhanced Lasing Effect of Plasmonic Lens Structured with Elliptical Nanopinholes Distributed in Variant Periods

Ultra-Enhanced Lasing Effect of Plasmonic Lens Structured with Elliptical Nanopinholes Distributed in Variant Periods

Effect of metallic nanoparticle sizes on the local field near their surface

Ag on carbon nanowalls mesostructures for SERS

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