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

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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.

LanguageEnglish
Article number9687803
Pages1-5
Number of pages5
JournalInternational Journal of Optics
Volume2019
DOIs
Publication statusPublished - 1 Jul 2019

Fingerprint

patch antennas
Microstrip antennas
Aluminum
far fields
Volume fraction
Scattering
aluminum
Oxidation
oxidation
scattering
Aluminum Oxide
Substrates
Silicon Dioxide
Alumina
aluminum oxides
Silica
dipoles
silicon dioxide
Wavelength
radii

Keywords

  • oxidation
  • Al sphere
  • far-field scattering

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.",
keywords = "oxidation, Al sphere, far-field scattering",
author = "Duncan McArthur and Francesco Papoff",
year = "2019",
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doi = "10.1155/2019/9687803",
language = "English",
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T1 - The effect of oxidation on the far-field scattering of aluminium patch antennae from visible to UV

AU - McArthur, Duncan

AU - Papoff, Francesco

PY - 2019/7/1

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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.

KW - oxidation

KW - Al sphere

KW - far-field scattering

U2 - 10.1155/2019/9687803

DO - 10.1155/2019/9687803

M3 - Article

VL - 2019

SP - 1

EP - 5

JO - International Journal of Optics

T2 - International Journal of Optics

JF - International Journal of Optics

SN - 1687-9384

M1 - 9687803

ER -