The Effect of Oxidation on the Far-Field Scattering of Aluminium Patch Antennae from Visible to UV
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 (SiO2). Using an effective medium approach to model the Al particle with an outer layer of alumina (Al2O3), we fi...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | International Journal of Optics |
| Online Access: | http://dx.doi.org/10.1155/2019/9687803 |
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| _version_ | 1850216003533799424 |
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| author | Duncan McArthur Francesco Papoff |
| author_facet | Duncan McArthur Francesco Papoff |
| author_sort | Duncan McArthur |
| collection | DOAJ |
| description | 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 (SiO2). Using an effective medium approach to model the Al particle with an outer layer of alumina (Al2O3), we find that the UV peak of total energy scattered in the far field shifts towards longer wavelengths for volume fractions of Al2O3 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 Al2O3, the total intensity of light scattered is significantly reduced. |
| format | Article |
| id | doaj-art-4170767b3e2649b4959dcceddd229e0d |
| institution | OA Journals |
| issn | 1687-9384 1687-9392 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Optics |
| spelling | doaj-art-4170767b3e2649b4959dcceddd229e0d2025-08-20T02:08:26ZengWileyInternational Journal of Optics1687-93841687-93922019-01-01201910.1155/2019/96878039687803The Effect of Oxidation on the Far-Field Scattering of Aluminium Patch Antennae from Visible to UVDuncan McArthur0Francesco Papoff1Department of Physics, SUPA, University of Strathclyde, 107 Rottenrow, Glasgow G4 0NG, UKDepartment of Physics, SUPA, University of Strathclyde, 107 Rottenrow, Glasgow G4 0NG, UKIn 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 (SiO2). Using an effective medium approach to model the Al particle with an outer layer of alumina (Al2O3), we find that the UV peak of total energy scattered in the far field shifts towards longer wavelengths for volume fractions of Al2O3 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 Al2O3, the total intensity of light scattered is significantly reduced.http://dx.doi.org/10.1155/2019/9687803 |
| spellingShingle | Duncan McArthur Francesco Papoff The Effect of Oxidation on the Far-Field Scattering of Aluminium Patch Antennae from Visible to UV International Journal of Optics |
| title | The Effect of Oxidation on the Far-Field Scattering of Aluminium Patch Antennae from Visible to UV |
| title_full | The Effect of Oxidation on the Far-Field Scattering of Aluminium Patch Antennae from Visible to UV |
| title_fullStr | The Effect of Oxidation on the Far-Field Scattering of Aluminium Patch Antennae from Visible to UV |
| title_full_unstemmed | The Effect of Oxidation on the Far-Field Scattering of Aluminium Patch Antennae from Visible to UV |
| title_short | The Effect of Oxidation on the Far-Field Scattering of Aluminium Patch Antennae from Visible to UV |
| title_sort | effect of oxidation on the far field scattering of aluminium patch antennae from visible to uv |
| url | http://dx.doi.org/10.1155/2019/9687803 |
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