title: The role of nanoparticle shapes and deterministic aperiodicity for the design of nanoplasmonic arrays.
abstract: In this paper, we study the role of nanoparticle shape and aperiodic arrangement in the scattering and spatial localization properties of plasmonic modes in deterministic-aperiodic (DA) arrays of metal nanoparticles. By using an efficient coupled-dipole model for the study of the electromagnetic response of large arrays excited by an external field, we demonstrate that DA structures provide enhanced spatial localization of plasmonic modes and a higher density of enhanced field states with respect to their periodic counterparts. Finally, we introduce and discuss specific design rules for the engineering and optimization of field enhancement and localization in DA arrays. Our results, which we fully validated by rigorous Generalized Mie Theory (GMT) and transition matrix (T-matrix) theory, demonstrate that DA arrays provide a robust platform for the design of a variety of novel optical devices with enhanced and controllable plasmonic fields.
authors.affiliation: Department of Electrical and Computer Engineering & Photonics Center, Boston University, Boston, MA 02215, USA.
authors.forename: Carlo
authors.initials: C
authors.lastname: Forestiere
authors.forename: Giovanni
authors.initials: G
authors.lastname: Miano
authors.forename: Svetlana V
authors.initials: SV
authors.lastname: Boriskina
authors.forename: Luca
authors.initials: L
authors.lastname: Dal Negro
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000295:instrumentation*; D010316:Particle Size; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D020349:Surface Plasmon Resonance / Q000295:instrumentation* / Q000379:methods*; D014159:Transducers