We numerically analyze the spectral properties of localized plasmon resonances in metal nanoparticles when these are above a dielectric substrate. This analysis is performed as a function of the various parameters involved in the problem (relative optical properties, particle–substrate separation, angle of incidence, etc.). It can be shown that from the spectral behavior of the resonance in the far field, information about particle near-field interactions can be obtained.
© 2006 Optical Society of America
Original Manuscript: January 3, 2006
Revised Manuscript: March 16, 2006
Manuscript Accepted: March 19, 2006
Vol. 1, Iss. 7 Virtual Journal for Biomedical Optics
F. Moreno, F. González, and J. M. Saiz, "Plasmon spectroscopy of metallic nanoparticles above flat dielectric substrates," Opt. Lett. 31, 1902-1904 (2006)