The effect of oxidation on the far-field scattering of aluminium patch antennae from visible to UV

Duncan McArthur; Francesco Papoff

doi:10.1155/2019/9687803

The effect of oxidation on the far-field scattering of aluminium patch antennae from visible to UV

Duncan McArthur, Francesco Papoff

Research output: Contribution to journal › Article › peer-review

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Abstract

In this paper we evaluate the effect of oxidation on the total power scattered in the far field by a 60nm radius Al sphere in the presence of a substrate comprised of either Al or silica (SiO ₂). Using an effective medium approach to model the Al particle with an outer layer of alumina (Al ₂O ₃), we find that the UV peak of total energy scattered in the far field shifts towards longer wavelengths for volume fractions of Al ₂O ₃ up to 20%. When particles with these volume fractions are held above an Al substrate, enhancement of two orders of magnitudes of the far-field power radiated by a dipole in the gap can be observed. For larger volume fractions of Al ₂O ₃, the total intensity of light scattered is significantly reduced.

Original language	English
Article number	9687803
Pages (from-to)	1-5
Number of pages	5
Journal	International Journal of Optics
Volume	2019
DOIs	https://doi.org/10.1155/2019/9687803
Publication status	Published - 1 Jul 2019

Keywords

oxidation
Al sphere
far-field scattering

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10.1155/2019/9687803Licence: CC BY 4.0

McArthur-Papoff-IJO2019-The-effect-of-oxidation-on-the-far-field-scattering-of-aluminium-patchFinal published version, 634 KBLicence: CC BY 4.0

2 Article
1 Chapter

Principal modes of Maxwell’s equations
Hourahine, B., McArthur, D. & Papoff, F., 3 Apr 2018, The Generalized Multipole Technique for Light Scattering. Wriedt, T. & Eremin, Y. (eds.). Berlin: Springer International Publishing AG, 33 p. (Springer Series on Atomic, Optical, and Plasma Physics).
Research output: Chapter in Book/Report/Conference proceeding › Chapter
Gap enhanced fluorescence as a road map for the detection of very weakly fluorescent emitters from visible to ultraviolet
McArthur, D. & Papoff, F., 27 Oct 2017, In: Scientific Reports. 7, 12 p., 14191.
Research output: Contribution to journal › Article › peer-review

Open Access
File
6 Citations (Scopus)

61 Downloads (Pure)
Enhancing ultraviolet spontaneous emission with a designed quantum vacuum
McArthur, D., Hourahine, B. & Papoff, F., 20 Feb 2017, In: Optics Express. 25, 4, p. 4162-4179 18 p.
Research output: Contribution to journal › Article › peer-review

Open Access
File
5 Citations (Scopus)

72 Downloads (Pure)

Cite this

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title = "The effect of oxidation on the far-field scattering of aluminium patch antennae from visible to UV",

abstract = "In this paper we evaluate the effect of oxidation on the total power scattered in the far field by a 60nm radius Al sphere in the presence of a substrate comprised of either Al or silica (SiO 2). Using an effective medium approach to model the Al particle with an outer layer of alumina (Al 2O 3), we find that the UV peak of total energy scattered in the far field shifts towards longer wavelengths for volume fractions of Al 2O 3 up to 20%. When particles with these volume fractions are held above an Al substrate, enhancement of two orders of magnitudes of the far-field power radiated by a dipole in the gap can be observed. For larger volume fractions of Al 2O 3, the total intensity of light scattered is significantly reduced. ",

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N2 - In this paper we evaluate the effect of oxidation on the total power scattered in the far field by a 60nm radius Al sphere in the presence of a substrate comprised of either Al or silica (SiO 2). Using an effective medium approach to model the Al particle with an outer layer of alumina (Al 2O 3), we find that the UV peak of total energy scattered in the far field shifts towards longer wavelengths for volume fractions of Al 2O 3 up to 20%. When particles with these volume fractions are held above an Al substrate, enhancement of two orders of magnitudes of the far-field power radiated by a dipole in the gap can be observed. For larger volume fractions of Al 2O 3, the total intensity of light scattered is significantly reduced.

AB - In this paper we evaluate the effect of oxidation on the total power scattered in the far field by a 60nm radius Al sphere in the presence of a substrate comprised of either Al or silica (SiO 2). Using an effective medium approach to model the Al particle with an outer layer of alumina (Al 2O 3), we find that the UV peak of total energy scattered in the far field shifts towards longer wavelengths for volume fractions of Al 2O 3 up to 20%. When particles with these volume fractions are held above an Al substrate, enhancement of two orders of magnitudes of the far-field power radiated by a dipole in the gap can be observed. For larger volume fractions of Al 2O 3, the total intensity of light scattered is significantly reduced.

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KW - far-field scattering

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JO - International Journal of Optics

JF - International Journal of Optics

SN - 1687-9384

M1 - 9687803

ER -

The effect of oxidation on the far-field scattering of aluminium patch antennae from visible to UV

Abstract

Keywords

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Research output

Principal modes of Maxwell’s equations

Gap enhanced fluorescence as a road map for the detection of very weakly fluorescent emitters from visible to ultraviolet

Enhancing ultraviolet spontaneous emission with a designed quantum vacuum

Cite this