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Journal articles
Localized surface plasmons on nanometric gold particles observed with an apertureless scanning near-field optical microscope
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.
Keywords :
Transition metals
Surface plasmon resonance
https://hal-utt.archives-ouvertes.fr/hal-02369545
Contributor : Jean-Baptiste Vu Van <>
Submitted on : Tuesday, November 19, 2019 - 9:28:00 AM
Last modification on : Friday, March 27, 2020 - 4:12:03 PM
Contributor : Jean-Baptiste Vu Van <>
Submitted on : Tuesday, November 19, 2019 - 9:28:00 AM
Last modification on : Friday, March 27, 2020 - 4:12:03 PM