Enhanced terahertz extinction of single plasmonic antennas with conically tapered waveguides
We demonstrate experimentally the resonant extinction of terahertz (THz) radiation by a single plasmonic bowtie antenna, formed by two n-doped Si monomers with a triangular shape and facing apexes. This demonstration is achieved by placing the antenna at the output aperture of a conically tapered wa...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2013-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/15/1/015006 |
| _version_ | 1797751693419479040 |
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| author | M C Schaafsma H Starmans A Berrier J Gómez Rivas |
| author_facet | M C Schaafsma H Starmans A Berrier J Gómez Rivas |
| author_sort | M C Schaafsma |
| collection | DOAJ |
| description | We demonstrate experimentally the resonant extinction of terahertz (THz) radiation by a single plasmonic bowtie antenna, formed by two n-doped Si monomers with a triangular shape and facing apexes. This demonstration is achieved by placing the antenna at the output aperture of a conically tapered waveguide, which enhances the intensity of the incident THz field at the antenna position by a factor of 10. The waveguide also suppresses the background radiation that is otherwise transmitted without being scattered by the antenna. Bowtie antennas, supporting localized surface plasmons, are relevant due to their ability to resonantly enhance the field intensity at the gap separating the two triangular elements. This gap has subwavelength dimensions, which allows the concentration of THz radiation beyond the diffraction limit. The combination of a bowtie plasmonic antenna and a conical waveguide may serve as a platform for far-field THz time-domain spectroscopy of single nanostructures placed in the gap. |
| first_indexed | 2024-03-12T16:53:18Z |
| format | Article |
| id | doaj.art-1b10db0b0e004c74854cf1152dd1d841 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:53:18Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-1b10db0b0e004c74854cf1152dd1d8412023-08-08T11:04:22ZengIOP PublishingNew Journal of Physics1367-26302013-01-0115101500610.1088/1367-2630/15/1/015006Enhanced terahertz extinction of single plasmonic antennas with conically tapered waveguidesM C Schaafsma0H Starmans1A Berrier2J Gómez Rivas3Center for Nanophotonics, FOM Institute AMOLF , c/o Philips Research Laboratories, High Tech Campus 4, 5656 AE Eindhoven, The NetherlandsCenter for Nanophotonics, FOM Institute AMOLF , c/o Philips Research Laboratories, High Tech Campus 4, 5656 AE Eindhoven, The Netherlands; Optics Research Group, Faculty of Applied Sciences, Delft University of Technology , Lorentzweg 1, 2628 CJ Delft, The NetherlandsCenter for Nanophotonics, FOM Institute AMOLF , c/o Philips Research Laboratories, High Tech Campus 4, 5656 AE Eindhoven, The NetherlandsCenter for Nanophotonics, FOM Institute AMOLF , c/o Philips Research Laboratories, High Tech Campus 4, 5656 AE Eindhoven, The Netherlands; COBRA Research Institute, Eindhoven University of Technology , PO Box 513, 5600 MB Eindhoven, The NetherlandsWe demonstrate experimentally the resonant extinction of terahertz (THz) radiation by a single plasmonic bowtie antenna, formed by two n-doped Si monomers with a triangular shape and facing apexes. This demonstration is achieved by placing the antenna at the output aperture of a conically tapered waveguide, which enhances the intensity of the incident THz field at the antenna position by a factor of 10. The waveguide also suppresses the background radiation that is otherwise transmitted without being scattered by the antenna. Bowtie antennas, supporting localized surface plasmons, are relevant due to their ability to resonantly enhance the field intensity at the gap separating the two triangular elements. This gap has subwavelength dimensions, which allows the concentration of THz radiation beyond the diffraction limit. The combination of a bowtie plasmonic antenna and a conical waveguide may serve as a platform for far-field THz time-domain spectroscopy of single nanostructures placed in the gap.https://doi.org/10.1088/1367-2630/15/1/015006 |
| spellingShingle | M C Schaafsma H Starmans A Berrier J Gómez Rivas Enhanced terahertz extinction of single plasmonic antennas with conically tapered waveguides New Journal of Physics |
| title | Enhanced terahertz extinction of single plasmonic antennas with conically tapered waveguides |
| title_full | Enhanced terahertz extinction of single plasmonic antennas with conically tapered waveguides |
| title_fullStr | Enhanced terahertz extinction of single plasmonic antennas with conically tapered waveguides |
| title_full_unstemmed | Enhanced terahertz extinction of single plasmonic antennas with conically tapered waveguides |
| title_short | Enhanced terahertz extinction of single plasmonic antennas with conically tapered waveguides |
| title_sort | enhanced terahertz extinction of single plasmonic antennas with conically tapered waveguides |
| url | https://doi.org/10.1088/1367-2630/15/1/015006 |
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