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Journal Articles Journal of Applied Physics Year : 2000

Localized surface plasmons on nanometric gold particles observed with an apertureless scanning near-field optical microscope

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Abstract

Using an apertureless scanning near-field optical microscope, we obtained wavelength dependent images of an isolated gold nanometric particle laid on a quartz substrate. The images show a sharp resonance around λ=488 nm. The far-field surface plasmon resonance of the spherical particles (diameter is 40 nm) in solution is centered at λ=530 nm. Atomic force microscope images give evidence that the particles spread on the substrate. The near-field blueshift of the resonance is thus explained by excitation of a surface plasmon resonance along the minor axis of an oblate spheroid shaped particle.
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hal-02369545 , version 1 (19-11-2019)

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Pierre-Michel Adam, Sakina Benrezzak, Jean-Louis Bijeon, Pascal Royer. Localized surface plasmons on nanometric gold particles observed with an apertureless scanning near-field optical microscope. Journal of Applied Physics, 2000, 88 (11), pp.6919-6921. ⟨10.1063/1.1323528⟩. ⟨hal-02369545⟩

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