Lattice modes and plasmonic linewidth engineering in gold and aluminum nanoparticle arrays

Abstract : Lattice modes have been proposed as a means to engineer and control the linewidth and spectral position of optical resonances in arrays of metallic nanoparticles sustaining localized surface plasmon (LSP) resonances. Lattice modes are produced by the interference of LSP-enhanced in-plane scattered light, leading to a Fano-like lineshape with reduced linewidth. In this paper, we study the lattice modes supported by gold and aluminium nanoparticle arrays in the visible and UV, both experimentally and theoretically. The measured and simulated dispersion curves allow us to comprehensively analyze the details of the LSP coupling in the array. We show that when the spectral position of the Rayleigh anomaly, which depends on the period of the array, is slightly blue-shifted with respect to the LSP resonance, the quality factor in the nanoparticle array is significantly increased. We also provide evidence that the formation for the lattice modes, i.e. the coupling between LSPs and the in-plane scattered light, critically depends on the incident light polarization, the coupling efficiency being maximum when the polarization direction is perpendicular to the propagation direction of the grazing wave. The results obtained provide design rules allowing high quality factor resonances throughout visible and ultraviolet spectral ranges, needed for sensing and active nanophotonic applications.
Document type :
Journal articles
Complete list of metadatas

Cited literature [31 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01571589
Contributor : Nicolas Bonod <>
Submitted on : Thursday, July 19, 2018 - 6:06:37 PM
Last modification on : Wednesday, March 20, 2019 - 2:08:02 PM
Long-term archiving on : Saturday, October 20, 2018 - 5:16:48 PM

File

al-au-grating-final.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

Dmitry Khlopin, Frédéric Laux, William P. Wardley, Jérôme Martin, Gregory A. Wurtz, et al.. Lattice modes and plasmonic linewidth engineering in gold and aluminum nanoparticle arrays. Journal of the Optical Society of America B, Optical Society of America, 2017, 34 (3), ⟨10.1364/JOSAB.34.000691⟩. ⟨hal-01571589⟩

Share

Metrics

Record views

112

Files downloads

139