title: Diffractive chains of plasmonic nanolenses: combining near-field focusing and collective enhancement mechanisms.
abstract: We study, by means of full-electrodynamic calculations using the layer-multiple-scattering method, the effect of diffractive coupling on the enhancement of the local electromagnetic field in periodic arrays of nanolenses consisting of three silver spheres with progressively decreasing sizes and separations. The interaction between the hot-spot modes of an isolated nanolens with the Rayleigh-Wood anomalies of the periodic lattice leads to a further enhancement of the local field intensity, which can be controlled by an appropriate choice of the geometrical parameters involved.
authors.affiliation: Department of Microelectronics, Institute of Advanced Materials, Physicochemical Processes, Nanotechnology and Microsystems, NCSR Demokritos, Athens GR-153 10, Greece. almpanis@imel.demokritos.gr
authors.forename: E
authors.initials: E
authors.lastname: Almpanis
authors.forename: N
authors.initials: N
authors.lastname: Papanikolaou
authors.forename: B
authors.initials: B
authors.lastname: Auguié
authors.forename: C
authors.initials: C
authors.lastname: Tserkezis
authors.forename: N
authors.initials: N
authors.lastname: Stefanou