Large-Area Two-Dimensional Plasmonic Meta-Glasses and Meta-Crystals: a Comparative Study

• Published in: Plasmonics (Norwell, Mass.) Vol. 12; no. 5; pp. 1381 - 1390
• Main Authors: De Zuani, Stefano, Rommel, Marcus, Vogelgesang, Ralf, Weis, Jürgen, Gompf, Bruno, Dressel, Martin, Berrier, Audrey
• Format: Journal Article
• Language: English
• Published: New York Springer US 2017; Springer Nature B.V
• Subjects: Biochemistry; Biological and Medical Physics; Biophysics; Biotechnology; Chemistry; Chemistry and Materials Science; Coupled dipole approximation; Disks; Extinction; Localized surface plasmons; Metallic nanoparticle arrays; Nanoparticles; Nanotechnology; Particle density (concentration); Particle interactions; Plasmonics; Random/ordered arrays; Localized surface plasmons; Coupled dipole approximation; Metallic nanoparticle arrays; Random/ordered arrays; Plasmonics
• ISSN: 1557-1955; 1557-1963; 1557-1963
• DOI: 10.1007/s11468-016-0397-9

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/μm 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.