Tunable composite nanoparticle for plasmonics

We present a numerical study of the tunability properties of a plasmonic subwavelength particle deposited on a metallic slab. The particle is composed of a metallic part, supporting a localized plasmon mode, separated from the slab by a dielectric spacer. It is shown that the position of the resonance wavelength can be modified over a large spectral range by changing either the spacer thickness by a few tens of nanometers or its susceptibility within the range of usual dielectrics. A linear relation is observed between the resonance wavelength and the spacer permittivity. (c) 2006 Optical Society of America.


Published in:
Optics Letters, 31, 2750-2752
Year:
2006
Publisher:
Optical Society of America
ISSN:
0146-9592
Keywords:
Laboratories:




 Record created 2011-04-11, last modified 2018-03-17

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