Large-Area Two-Dimensional Plasmonic Meta-Glasses and Meta-Crystals: a Comparative Study
Artikel i vetenskaplig tidskrift, 2017

The geometrical arrangement of metallic nanoparticles plays a crucial role on the optical response of nanoplasmonic samples due to particle-particle interactions. In this work, large-area, two-dimensional meta-glasses (random arrangements) and meta-crystals (periodic arrangements) made of identical metallic nanoparticles are investigated for three different particle densities of 5, 10, and 15 discs/mu m(2). A direct comparison between random and periodically ordered arrays is presented. The comparison clearly shows that the particle density has the largest influence on the extinction spectra for both periodic and random samples, and that for equal densities, the optical response away from diffraction effects is strikingly similar in both cases. The role of the radial density function and minimum particle distance is also determined. This study elucidates the role of the particle-particle interactions on the response of plasmonic nanoparticles and indicates how to control position and shape of the plasmonic resonance.

Localized surface plasmons

Metallic nanoparticle arrays

Coupled dipole approximation

Plasmonics

Random/ordered arrays

Författare

Stefano De Zuani

Universitat Stuttgart

Marcus Rommel

Chalmers, Mikroteknologi och nanovetenskap (MC2), Nanotekniklaboratoriet

R. Vogelgesang

Universitat Oldenburg

Max Planck-institutet

Juergen Weis

Max Planck-institutet

Bruno Gompf

Universitat Stuttgart

Martin Dressel

Universitat Stuttgart

Audrey Berrier

Universitat Stuttgart

Plasmonics

1557-1955 (ISSN)

Vol. 12 1381-1390

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1007/s11468-016-0397-9