Optimal position of an emitter in a wavelength-scale parabolic reflector (article)
dc.contributor.author | Penketh, H | |
dc.contributor.author | Bertolotti, J | |
dc.contributor.author | Barnes, WL | |
dc.date.accessioned | 2019-10-10T13:18:20Z | |
dc.date.issued | 2019-10-04 | |
dc.description.abstract | We investigate the optimum emitter position within reflecting parabolic antennas whose size is comparable to the emission wavelength. Using finite-element modeling we calculate the dependence of the amount of power directed into a 20° half-angle cone on the emitter’s position and compare with results obtained using geometrical optics. The spatially varying density of states within the wavelength-scale reflector is mapped and its impact discussed. In addition, it is demonstrated that changing the characteristic size of the reflector within the range from 0.5 to 1.5 times the emission wavelength has a strong bearing on the optimum emitter position, a position that does not in general coincide with the parabola’s focus. We calculate that the optimal antenna size and emitter position allow for the maximum directed power to exceed that obtained in the geometrical optics regime. | en_GB |
dc.description.sponsorship | Dyson | en_GB |
dc.description.sponsorship | Engineering and Physical Sciences Research Council (EPSRC) | en_GB |
dc.identifier.citation | Vol. 58 (29), pp. 7957 - 7961 | en_GB |
dc.identifier.doi | 10.1364/ao.58.007957 | |
dc.identifier.uri | http://hdl.handle.net/10871/39155 | |
dc.language.iso | en | en_GB |
dc.publisher | Optical Society of America | en_GB |
dc.relation.url | https://doi.org/10.24378/exe.1883 | en_GB |
dc.rights | © 2019 Optical Society of America. Open access. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. | en_GB |
dc.title | Optimal position of an emitter in a wavelength-scale parabolic reflector (article) | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2019-10-10T13:18:20Z | |
dc.identifier.issn | 1559-128X | |
dc.description | This is the final version. Available on open access from the Optical Society of America via the DOI in this record | en_GB |
dc.description | The dataset associated with this article is available in ORE at https://doi.org/10.24378/exe.1883, with the title 'On the optimal position of an emitter in a wavelength-scale parabolic reflector' | en_GB |
dc.identifier.journal | Applied Optics | en_GB |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2019-08-28 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2019-10-04 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2019-10-10T13:15:04Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2019-10-10T13:18:24Z | |
refterms.panel | B | en_GB |
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Except where otherwise noted, this item's licence is described as © 2019 Optical Society of America. Open access. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.