Volpe Giorgio, Cherukulappurath Sudhir, Juanola Parramon Roser, Molina-Terriza Gabriel, Quidant Romain
ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain.
Nano Lett. 2009 Oct;9(10):3608-11. doi: 10.1021/nl901821s.
We report on a novel approach, based on sub-wavelength spatial phase variations at the focus of high-order beams, to reconfigure the optical near field distribution near plasmonic nanostructures. We first show how the introduction of phase jumps in the incident field driving a gap nanoantenna strongly affects its near field response. Beyond, we demonstrate the feasibility of exploiting this approach to selectively switch on and off hot-spots sites within a complex antenna architecture.
