Transmission of light through a thin metal film with periodically and randomly corrugated surfaces

Baumeier, Björn; Leskova, T. A.; Maradudin, A. A.

doi:10.1088/1464-4258/8/4/s20

Cited by 23 publications

(25 citation statements)

References 12 publications

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“…In the case of the extraordinary transmission of light through a metal film with a periodic nanoslit array, the surface polaritons supported by the slits play a minor role in the phenomenon, and what is more it is not necessary to have slits that completely pierce the metallic film to achieve the enhanced transmission 4 . When a periodic nanogroove array is illuminated by p−polarized light, whose magnetic vector is parallel to the generators of the array, surface plasmon polaritons (SPPs) associated with the film-cladding and the film-substrate interfaces are excited 4,5 , and are diffracted by the structure into transmitted volume waves in the substrate. The periodicity of the array enhances the excitation of surface plasmon polaritons associated with the cladding-film interface and the conversion of surface plasmon polaritons associated with the substrate-film interface into volume waves in a range of SPP frequencies whose wavenumbers are in the vicinity of the boundary of the second Brillouin zone, i.e.…”

Section: Kimmentioning

confidence: 99%

“…when λ sp ∼ d, where d is the period of the array and λ sp is the surface plasmon polariton wavelength. As a result the transmission through gold and silver films as a function of wavelength 4 shows sharp peaks and dips in a range of SPP frequencies whose wavenumbers are near the boundary of the second Brillouin zone at both interfaces of the film.…”

Section: Kimmentioning

confidence: 99%

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Nanogroove array on thin metallic film as planar lens with tunable focusing

et al. 2012

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Numerical results for the distributions of light transmitted through metallic planar lenses composed of symmetric nanogroove arrays on the surfaces of a gold film are presented and explained.Both the near-and far-field distributions of the intensity of light transmitted are calculated by using a Green's function formalism. Results for an optimal transverse focus based on a quadratic variation of groove width are obtained. Meanwhile, a significant dependence of the focal length on the wavelength of light incident from the air side through the gold film into a dielectric substrate is found for this detector configuration.

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Section: Kimmentioning

confidence: 99%

Section: Kimmentioning

confidence: 99%

Nanogroove array on thin metallic film as planar lens with tunable focusing

et al. 2012

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“…Enhanced backward scattering has been studied by using rough metallic surfaces [9][10][11]. Most studies related to backward scattering exploit only noble metals such as silver and gold.…”

Section: Theotical Model Of Backward Scatteringmentioning

confidence: 99%

Backward scattering effect of aligned carbon nanotube arrays

Wang

2009

SPIE Proceedings

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In terms of operational bandwidth and speed, photonic components are superior to electronic ones. However, it is difficult to control photons on nanoscale structures for data processing and interconnection. Nanophotonic device using surface plasmon (SP) offers an ideal solution to combine the superior technical advantages of both photonics and electronics on the same chip. The SP wavelength is much shorter than that of the exciting light, allowing the use of SP in various techniques that overcome diffraction limits. In this paper, we report an interesting plasmonic effect, enhanced backward scattering, by using a periodically-aligned carbon nanotube (CNT) array. The CNTs are grown on a transparent glass substrate with an average diameter of 50 nm and a length of about 1 µm. To enhance the conductivity, the CNTs are also coated with 10-nm Au layer by using E-beam CVD technique. By shining a laser beam to the CNT array, we found that the scattering intensity is maximally enhanced at the backward incident direction. The enhanced backward incident scattering is observed by using both periodic and nonperiodic CNT samples. The experimental results suggest that the backward scattering effect is due to the SP excitation and coupling. The proposed technique exploiting aligned carbon-nanotube arrays to manipulate surface plasmon will lead to useful optical features such as optical antennae effects, retro-reflection, switching, wavelength add/drop multiplexing, and may be particularly useful for optical sensing, smart target identification and optical wireless secure communication applications.

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“…Here, rather than using a Green's function formalism , 8,9 we present a scattering-wave theory which utilizes slit-eigenmode expansion to treat an arbitrary array of slits having arbitrary spacings, width and dielectrics. Specifically, as an example, we consider a tripleslit structure in which the middle opaque slit is used for the front-side local surface plasmon excitation by an incident Gaussian beam either at a particular wavelength or at double that wavelength, and two other side slits are used for the wavelength-dependent detection of surface-plasmon mediated light-beam splitting in the near-field region.…”

Section: Introductionmentioning

confidence: 99%

Surface-plasmon mediated near-field light diffraction

Huang

Wellems

2012

SPIE Proceedings

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The electromagnetic response of an arbitrary array of multiple slits perforated on a metallic film and filled with different slit dielectric materials is studied in an analytical way. As a specific example, we consider a tripleslit structure perforated on a gold film, where the middle slit is used for the surface-plasmon excitation by a narrow Gaussian beam while the other two side slits are used for the detection of a transmitted surface-plasmon wave propagated from the middle opaque slit either at a particular wavelength or at double that wavelength, respectively. For this particular structure, we show that only one of the two side observation slits can be in a passing state for a particular wavelength, but the other blocked slit will change to a passing state at double that wavelength with a specific design for the slit depth, silt dielectric and inter-slit distance in the deep subwavelength regime. In this sense, we create a surface-plasmon mediated light diffraction in the near-filed regime.

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Transmission of light through a thin metal film with periodically and randomly corrugated surfaces

Cited by 23 publications

References 12 publications

Nanogroove array on thin metallic film as planar lens with tunable focusing

Nanogroove array on thin metallic film as planar lens with tunable focusing

Backward scattering effect of aligned carbon nanotube arrays

Surface-plasmon mediated near-field light diffraction

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