Mapping gigahertz vibrations in a plasmonic–phononic crystal
We image the gigahertz vibrational modes of a plasmonic–phononic crystal at sub-micron resolution by means of an ultrafast optical technique, using a triangular array of spherical gold nanovoids as a sample. Light is strongly coupled to the plasmonic modes, which interact with the gigahertz phonons...
| 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/10.1088/1367-2630/15/2/023013 |
| _version_ | 1797751701267021824 |
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| author | Timothy A Kelf Wataru Hoshii Paul H Otsuka Hirotaka Sakuma Istvan A Veres Robin M Cole Sumeet Mahajan Jeremy J Baumberg Motonobu Tomoda Osamu Matsuda Oliver B Wright |
| author_facet | Timothy A Kelf Wataru Hoshii Paul H Otsuka Hirotaka Sakuma Istvan A Veres Robin M Cole Sumeet Mahajan Jeremy J Baumberg Motonobu Tomoda Osamu Matsuda Oliver B Wright |
| author_sort | Timothy A Kelf |
| collection | DOAJ |
| description | We image the gigahertz vibrational modes of a plasmonic–phononic crystal at sub-micron resolution by means of an ultrafast optical technique, using a triangular array of spherical gold nanovoids as a sample. Light is strongly coupled to the plasmonic modes, which interact with the gigahertz phonons by a process akin to surface-enhanced stimulated Brillouin scattering. A marked enhancement in the observed optical reflectivity change at the centre of a void on phononic resonance is likely to be caused by this mechanism. By comparison with numerical simulations of the vibrational field, we identify resonant breathing deformations of the voids and elucidate the corresponding mode shapes. We thus establish scanned optomechanical probing of periodic plasmonic–phononic structures as a new means of investigating their coupled excitations on the nanoscale. |
| first_indexed | 2024-03-12T16:53:24Z |
| format | Article |
| id | doaj.art-33e17c1c5f854a7d9699ea775bc6d895 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:53:24Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-33e17c1c5f854a7d9699ea775bc6d8952023-08-08T11:04:13ZengIOP PublishingNew Journal of Physics1367-26302013-01-0115202301310.1088/1367-2630/15/2/023013Mapping gigahertz vibrations in a plasmonic–phononic crystalTimothy A Kelf0Wataru Hoshii1Paul H Otsuka2Hirotaka Sakuma3Istvan A Veres4Robin M Cole5Sumeet Mahajan6Jeremy J Baumberg7Motonobu Tomoda8Osamu Matsuda9Oliver B Wright10Division of Applied Physics, Faculty of Engineering, Hokkaido University , Sapporo 060-8628, JapanDivision of Applied Physics, Faculty of Engineering, Hokkaido University , Sapporo 060-8628, JapanDivision of Applied Physics, Faculty of Engineering, Hokkaido University , Sapporo 060-8628, JapanDivision of Applied Physics, Faculty of Engineering, Hokkaido University , Sapporo 060-8628, JapanResearch Center for Non-Destructive Testing GmbH, Altenberger Straße 69, A-4040 Linz, AustriaNanophotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 OHE, UKNanophotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 OHE, UKNanophotonics Centre, Cavendish Laboratory, University of Cambridge , Cambridge CB3 OHE, UKDivision of Applied Physics, Faculty of Engineering, Hokkaido University , Sapporo 060-8628, JapanDivision of Applied Physics, Faculty of Engineering, Hokkaido University , Sapporo 060-8628, JapanDivision of Applied Physics, Faculty of Engineering, Hokkaido University , Sapporo 060-8628, JapanWe image the gigahertz vibrational modes of a plasmonic–phononic crystal at sub-micron resolution by means of an ultrafast optical technique, using a triangular array of spherical gold nanovoids as a sample. Light is strongly coupled to the plasmonic modes, which interact with the gigahertz phonons by a process akin to surface-enhanced stimulated Brillouin scattering. A marked enhancement in the observed optical reflectivity change at the centre of a void on phononic resonance is likely to be caused by this mechanism. By comparison with numerical simulations of the vibrational field, we identify resonant breathing deformations of the voids and elucidate the corresponding mode shapes. We thus establish scanned optomechanical probing of periodic plasmonic–phononic structures as a new means of investigating their coupled excitations on the nanoscale.https://doi.org/10.1088/1367-2630/15/2/023013 |
| spellingShingle | Timothy A Kelf Wataru Hoshii Paul H Otsuka Hirotaka Sakuma Istvan A Veres Robin M Cole Sumeet Mahajan Jeremy J Baumberg Motonobu Tomoda Osamu Matsuda Oliver B Wright Mapping gigahertz vibrations in a plasmonic–phononic crystal New Journal of Physics |
| title | Mapping gigahertz vibrations in a plasmonic–phononic crystal |
| title_full | Mapping gigahertz vibrations in a plasmonic–phononic crystal |
| title_fullStr | Mapping gigahertz vibrations in a plasmonic–phononic crystal |
| title_full_unstemmed | Mapping gigahertz vibrations in a plasmonic–phononic crystal |
| title_short | Mapping gigahertz vibrations in a plasmonic–phononic crystal |
| title_sort | mapping gigahertz vibrations in a plasmonic phononic crystal |
| url | https://doi.org/10.1088/1367-2630/15/2/023013 |
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