Investigating the origin of third harmonic generation from diabolo optical antennas

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Shi, L.; Andrade, J.R.C.; Kim, H.; Han, S.; Nicolas, R. et al.: Investigating the origin of third harmonic generation from diabolo optical antennas. In: Applied Physics Letters 111 (2017), Nr. 17, 173102. DOI: https://doi.org/10.1063/1.5001005

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Sum total of downloads: 217




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We propose to use diabolo nanoantennas for experimentally investigating the origin of the enhanced third harmonic generation by localized surface plasmon polaritons. In such a geometry, the opposing apexes of bowties are electrically connected by a thin gold nanorod, which has two important functions in discriminating the point of harmonic generation. First, the inserted gold nanorod shifts the field enhancement area to be far away from the dielectric substrate material. Next, the accumulation of free charges at the adjacent bowtie tips produces a strong electric field inside the gold nanorod. The diabolo nanoantennas allow us to examine the contribution of the bare gold susceptibility to the third harmonic conversion. Our results reveal that the bare gold does not significantly enhance the harmonic generation at high pump intensity. From this, we deduce that in regular bowtie antennas, the enhanced harmonic photons mainly arise from the substrate sapphire that is located in the feedgap of the bowtie, where the electric near-field is significantly enhanced by the localized surface plasmons. © 2017 Author(s).
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2017
Appears in Collections:Fakultät für Mathematik und Physik

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pos. country downloads
total perc.
1 image of flag of Germany Germany 132 60.83%
2 image of flag of United States United States 28 12.90%
3 image of flag of China China 10 4.61%
4 image of flag of Turkey Turkey 7 3.23%
5 image of flag of No geo information available No geo information available 6 2.76%
6 image of flag of France France 4 1.84%
7 image of flag of Portugal Portugal 3 1.38%
8 image of flag of Lebanon Lebanon 3 1.38%
9 image of flag of Korea, Republic of Korea, Republic of 3 1.38%
10 image of flag of Canada Canada 2 0.92%
    other countries 19 8.76%

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