Excitation of confined modes on particle arrays [article]

Xesús Manoel Bendaña, Giuseppe Pirruccio Centre for Nanophotonics, FOM Institute AMOLF c/o Philips Research Laboratories, Eindhoven, The Netherlands, COBRA Research Institute, Eindhoven University of Technology, Eindhoven, The Netherlands, Optoelectronics Research Centre, University of Southampton, Southampton, UK)
2012 arXiv   pre-print
We describe both theoretically and experimentally the existence and excitation of confined modes in planar arrays of gold nanodisks. Ordered 2D lattices of monodispersive nanoparticles are manufactured, embedded in a silica matrix, and exposed to evanescent prism-coupling illumination, leading to dark features in the reflectivity, which signal the presence of confined modes guided along the arrays. We find remarkable agreement between theory and experiment in the frequency-momentum dispersion
more » ... the resonances. Direct excitation of these modes reveals long propagation distances and deep extinction features. This characterization of guided modes shows the great potential of metallic particle arrays for optical signal processing and distant sensing applications.
arXiv:1209.2626v1 fatcat:tucdothywnhzlbhhjb33cmd6ym