Analysis of light scattering in the evanescent waves area by a cylindrical nanohole in a noble-metal film

Eremina, Elena; Eremin, Yu. A.; Grishina, N. V.; Wriedt, Thomas

doi:10.1016/j.optcom.2008.03.039

Cited by 12 publications

(7 citation statements)

References 21 publications

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“…However, only a few works deal with the problem of enhanced transmission by subwavelength slits under evanescent incidence. In [8,9] the authors investigate the scattering by an opaque screen with a single slit illuminated by evanescent waves generated at a prism under total internal reflection (TIR). In previous works we have reported the possibility of evanescent-to-propagating conversion by means of a periodic array of wires near a dielectric interface at which evanescent waves are generated.…”

Section: Introductionmentioning

confidence: 99%

Enhanced transmission via evanescent-to-propagating conversion in metallic nanoslits: role of Rayleigh anomalies

Skigin¹,

Lester²

2014

J. Opt.

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We analyze the enhanced transmission phenomenon in subwavelength slit structures near a dielectric interface. In particular, we investigate the influence of Rayleigh anomalies in the spectral position as well as in the bandwidth of Fabry-Perot resonances excited on such structures. We consider the cases of propagating and evanescent incidence, i.e., when the metallic structure is illuminated from the dielectric medium side with an incidence angle larger than the critical angle. We show that Rayleigh anomalies strongly interact with Fabry-Perot resonances, and make them deviate from the spectral positions predicted by the infinitely thin slit model. To get physical insight into this problem, we develop a simplified electromagnetic model and show that there is a close correspondence between the transmitted response of the structure and the behavior of certain function that depends on the geometrical and the illumination parameters. Our results suggest that Rayleigh anomalies strongly modify the electromagnetic response of the structure due to the existence of surface waves that modify the coupling condition between the fields inside and outside the slits. Besides, we show that even in absence of Fabry-Perot resonances, it is possible to produce enhanced transmission by taking advantage of the pseudoperiodicity condition of the fields.

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Section: Introductionmentioning

confidence: 99%

Enhanced transmission via evanescent-to-propagating conversion in metallic nanoslits: role of Rayleigh anomalies

Skigin¹,

Lester²

2014

J. Opt.

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“…As it was found, the ETE does not depend on the metal film's thickness, the hole's diameter and its filling, but it is strongly influenced by the metal film material [33]. In the following papers it was demonstrated that the ETE occurs not only for holes but also for other types of film irregularities as well [34,35].…”

Section: Introductionmentioning

confidence: 88%

“…The spectral coefficients A and B can be determined from one-dimensional transmission conditions which can be found everywhere [33]. In particular, the equality v e 31 = v h 31 holds for z ≥ d 2 .…”

Section: Discrete Sources Methodsmentioning

confidence: 99%

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Analysis of the extreme scattering effect for particles inside and above a noble metal film via the discrete sources method

Eremina¹,

Eremin²,

Grishina³

et al. 2011

J. Opt.

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In this paper the discrete sources method is applied to analyze the extreme scattering effect for particles located both inside and on a gold film deposited on a glass prism. The extreme scattering effect is an effect of the sharp increase of the scattered intensity for P-polarized excitation which occurs in the evanescent wave region behind the critical angle. Moreover, the intensity enhancement appears not only in the transmission direction but in the backscattering direction as well. The effect does not depend on the thickness of the metal film or particle diameter, but it is strongly affected by the film material. Different scattering characteristics, such as transmission cross section and reflection cross sections and their correlation with the surface plasmon resonance in the film, are investigated and discussed in this paper. The analysis of the influence of a thin transparent spacer layer between particle and gold film on the scattering characteristics has been performed. The differential scattering cross section is considered to examine the field distribution in the forward and backscattering directions.

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“…There is absolutely no doubt about the fact that an evanescent wave is a non-propagating wave. On the other hand, it is a well established fact, both experimentally [2][3][4][5][6][7][8] and theoretically, [8][9][10][11][12][13] that an evanescent wave can indeed be scattered by nonabsorbing objects. An overview of light scattering of evanescent waves was given by Sigel.…”

mentioning

confidence: 99%

Letters to the Editor

Erbe

2013

Appl Spectrosc

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Analysis of light scattering in the evanescent waves area by a cylindrical nanohole in a noble-metal film

Cited by 12 publications

References 21 publications

Enhanced transmission via evanescent-to-propagating conversion in metallic nanoslits: role of Rayleigh anomalies

Enhanced transmission via evanescent-to-propagating conversion in metallic nanoslits: role of Rayleigh anomalies

Analysis of the extreme scattering effect for particles inside and above a noble metal film via the discrete sources method

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