3-dimensional time-domain full-wave analysis of optical array antennas
We report on the 3-dimensional full-wave analysis of optical array antennas that employ a dipole element as the fundamental building block. We use a finite element time domain (FETD) method discretized on unstructured tetrahedral grids in order to efficiently resolve the geometry which - has a wide...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
1. August 2011
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| In: |
Journal of computational and theoretical nanoscience
Year: 2011, Volume: 8, Issue: 8, Pages: 1573-1589 |
| ISSN: | 1546-1963 |
| DOI: | 10.1166/jctn.2011.1852 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1166/jctn.2011.1852
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| Author Notes: | Benedikt Oswald, Aleksejs Fomins, Arya Fallahi, Patrick Leidenberger, and Peter Bastian |
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| 245 | 1 | 0 | |a 3-dimensional time-domain full-wave analysis of optical array antennas |c Benedikt Oswald, Aleksejs Fomins, Arya Fallahi, Patrick Leidenberger, and Peter Bastian |
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| 520 | |a We report on the 3-dimensional full-wave analysis of optical array antennas that employ a dipole element as the fundamental building block. We use a finite element time domain (FETD) method discretized on unstructured tetrahedral grids in order to efficiently resolve the geometry which - has a wide range of characteristic length scales, from the nanometer to the micrometer range. Such devices are useful in a number of applications in order to convert propagating electromagnetic energy into localized energy which is concentrated within a spot whose dimension is significantly - smaller than the wavelength. This capability is especially useful for field emitter arrays (FEA) used in novel, ultra-low emittance photocathodes. The antenna elements are modeled with gold metallic properties in the optical region of the electromagnetic spectrum. There, gold is a dispersive - dielectric material and desribed with a Drude dielectric material model. To support the validity of our analysis we numerically analyze electromagnetic problems that can be solved analytically, thus benchmarking the algorithm. We then computationally analyze a single dipole element - in free space and a logarithmically periodic array of dipoles, similar to the concept of the Yagi-Uda array antenna in the microwave region. We demonstrate the existence of resonant modes on the dipole rod elements. Eventually, we comment on further development work. | ||
| 650 | 4 | |a ARRAY ANTENNAS | |
| 650 | 4 | |a DISPERSIVE DIELECTRIC MODEL | |
| 650 | 4 | |a DRUDE MODEL COMPUTATIONAL ELECTRODYNAMICS | |
| 650 | 4 | |a ELECTROMAGNETIC | |
| 650 | 4 | |a FETD | |
| 650 | 4 | |a FIELD EMITTER ARRAYS (FEA) | |
| 650 | 4 | |a FINITE ELEMENT TIME DOMAIN METHOD | |
| 650 | 4 | |a OPTICAL ANTENNAS | |
| 650 | 4 | |a SUB-WAVELENGTH SIZE | |
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| 700 | 1 | |a Fallahi, Arya |e VerfasserIn |4 aut | |
| 700 | 1 | |a Leidenberger, Patrick |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bastian, Peter |d 1964- |e VerfasserIn |0 (DE-588)1045599794 |0 (DE-627)774643374 |0 (DE-576)399098224 |4 aut | |
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