Phys. Rev. B 76, 184302 (2007) [5 pages]Optical properties of metal nanoparticles with no center of inversion symmetry: Observation of volume plasmonsReceived 4 August 2007; revised 30 September 2007; published 13 November 2007 We present theoretical and experimental studies of the optical response of L-shaped silver nanoparticles. The scattering spectrum exhibits several plasmon resonances that depend sensitively on the polarization of the incident electromagnetic field. The physical origin of the resonances is traced to different plasmon phenomena. In particular, a high energy band with unusual properties is interpreted in terms of volume plasmon oscillations arising from the asymmetry of a nanoparticle. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.76.184302
DOI:
10.1103/PhysRevB.76.184302
PACS:
78.67.−n, 78.67.Bf, 78.70.−g, 78.20.Bh
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