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Mapping gigahertz vibrations in a plasmonic-phononic crystal
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| Title: | Mapping gigahertz vibrations in a plasmonic-phononic crystal |
| Authors: | Kelf, Timothy A. Browse this author | | Hoshii, Wataru Browse this author | | Otsuka, Paul H. Browse this author | | Sakuma, Hirotaka Browse this author | | Veres, Istvan A. Browse this author | | Cole, Robin M. Browse this author | | Mahajan, Sumeet Browse this author | | Baumberg, Jeremy J. Browse this author | | Tomoda, Motonobu Browse this author →KAKEN DB | | Matsuda, Osamu Browse this author →KAKEN DB | | Wright, Oliver B. Browse this author →KAKEN DB |
| Issue Date: | Feb-2013 |
| Publisher: | IOP Publishing |
| Journal Title: | New Journal of Physics |
| Volume: | 15 |
| Start Page: | 023013 |
| Publisher DOI: | 10.1088/1367-2630/15/2/023013 |
| Abstract: | 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. |
| Rights: | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/52182 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: WRIGHT O. B.
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