Optical Forces on Silver Homogeneous Nanotubes: Study of Shell Plasmonic Interaction

Ekeroth, R. M. Abraham; Lester, M.

doi:10.1007/s11468-015-9890-9

Cited by 8 publications

(18 citation statements)

References 41 publications

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“…The concept that force calculated by contour type C 1 is associated with to radiationʼs pressure exerted on the particle has to be abandoned in this case. While in the case of homogeneous shell we found that forces calculated by C 1 coincided perfectly with forces calculated by far field approach of radiationʼs pressure (see equation (2) on the work [4]), in case of inhomogeneous shell this is no longer true. In section 4 this statement will remain clear.…”

Section: Methodology and Conventionsmentioning

confidence: 52%

“…The results of figure 3 are a proof that curves α, obtained by integration of the Maxwellʼs stress tensor, (4), contain information about the complete interaction in the structure and not only would give us an expression for radiationʼs pressure [4,9], as one primarily may think. The radiationʼs pressure that one could expect is more related to the corresponding curves for j =  90, 270 } on this figure are identical, is directly related to the results (for nearfields) showed in figures 7(c) and 7(d) on [2].…”

Section: Resultsmentioning

confidence: 82%

“…In order to establish a correlation between far-field results with those from near-fields, which arise from calculations of NDFs and NDTs, we plot the extinction curves for the structure similarly to the analyzed in the work for homogeneous shells [4], figure 2. In order to follow the correlation easily, we have added an inset with the scheme of incidence configuration.…”

Section: Resultsmentioning

confidence: 99%

“…We denote the center of mass of the system with g. An incident plane wave approaches from far field with electric field amplitude = E 1 0 statvoltcm 1 , at angle j 0 . As in [4] this value of field corresponds to an intensity of = -I 10 0 3 mW mm 2 . In our previous paper [4], we have taken three types of contours for calculations of forces.…”

Section: Methodology and Conventionsmentioning

confidence: 99%

“…As in [4] this value of field corresponds to an intensity of = -I 10 0 3 mW mm 2 . In our previous paper [4], we have taken three types of contours for calculations of forces. These three types of results, corresponding to calculations from equation (4) (and now including equation ( 5)), provide us important information about the electromagnetic interaction in the system.…”

Section: Methodology and Conventionsmentioning

confidence: 99%

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Detection of eccentricity in silver nanotubes by means of induced optical forces and torques

Ekeroth

Lester

2015

J. Opt.

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Plasmonics 10 989-98), we have conducted an exhaustive study about optical properties of metallic realistic two-dimensional (2D) nanotubes, using an experimentalinterpolated dielectric function (Palik 1985 Handbook of Optical Constants of Solids (Toronto: Academic Press)). In the case of non-homogeneous metallic shells, we suggested (in a theoretical form) a procedure to detect the non-uniformity of shells in parallel, disperse and randomly oriented long nanotubes (2D system). This detection is based exclusively on the plasmonic properties of the response (Abraham Ekeroth and Lester 2012 Plasmonics 7 579). Here we consider exact calculations of forces and torques, exerted by light on these kinds of nanostructures, illustrating the mechanical effects of plasmonic excitations with one example of silver shell under p-polarized incidence. This study continues with the methodology implemented in the previous paper (Abraham Ekeroth R M and Lester M 2015 Plasmonics 10 989-98), for homogeneous nanotubes. The features of the electromagnetic interaction in these structures, from the point of view of mechanical magnitudes, make it possible to conceive new possible interesting applications. Particularly, we point out some results regarding detection of eccentricity in nanotubes in vacuum (when Brownian movement is not taken into account). We interpret the optical response of the realistic shells in the framework of plasmon hybridization model (PHM), which is deduced from a quasi-static approximation. Our integral formalism provides for retardation effects and possible errors is only due to its numerical implementation.

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Section: Methodology and Conventionsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Methodology and Conventionsmentioning

confidence: 99%

Section: Methodology and Conventionsmentioning

confidence: 99%

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Detection of eccentricity in silver nanotubes by means of induced optical forces and torques

Ekeroth

Lester

2015

J. Opt.

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Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations

Ekeroth

Lester

2013

Plasmonics

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The optical extinction spectra of micro-and nanoparticles made up of high-contrast dielectrics exhibit a set of very intense peaks due to the excitations of morphology-dependent resonances (MDRs). These kind of resonances are well known at the microscopic scale as whispering gallery modes. In this work, we study numerically the optical spectra corresponding to a core-shell structure composed by an infinite silicon nanowire coated with a silver shell. This structure shows a combination of both excitations: MDRs and the well-known surface plasmon resonances in dielectric metallic core-shell nanoparticles (Ekeroth Abraham and Lester, Plasmon 2012). We compute in an exact form the complete electromagnetic response for both bare and coated silicon nanowires in the range of 24-200 nm of cross-sectional sizes. We take into account an experimental bulk dielectric function of crystalline silicon and silver by using a correction by size of the metal dielectric function. In this paper, we consider small silver shells in the range of 1-10 nm of thickness as coatings. We analyze the optical response in both the far and near fields, involving wavelengths in the extended range of 300-2,400 nm. We show that the MDRs excited at the core are selectively perturbated by the metallic shell through the bonding and antibonding surface plasmons (SPs). This perturbation depends on both the size of the core and the

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Theoretical Modeling of Average Force Acted on Nano Plasma Spheres in Presence of Radiation of Long Wavelength Point Source

2016

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Optical Forces on Silver Homogeneous Nanotubes: Study of Shell Plasmonic Interaction

Cited by 8 publications

References 41 publications

Detection of eccentricity in silver nanotubes by means of induced optical forces and torques

Detection of eccentricity in silver nanotubes by means of induced optical forces and torques

Optical Properties of Silver-Coated Silicon Nanowires: Morphological and Plasmonic Excitations

Theoretical Modeling of Average Force Acted on Nano Plasma Spheres in Presence of Radiation of Long Wavelength Point Source

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