title: Coherent control of plasmonic nanoantennas using optical eigenmodes.
abstract: The last decade has seen subwavelength focusing of the electromagnetic field in the proximity of nanoplasmonic structures with various designs. However, a shared issue is the spatial confinement of the field, which is mostly inflexible and limited to fixed locations determined by the geometry of the nanostructures, which hampers many applications. Here, we coherently address numerically and experimentally single and multiple plasmonic nanostructures chosen from a given array, resorting to the principle of optical eigenmodes. By decomposing the light field into optical eigenmodes, specifically tailored to the nanostructure, we create a subwavelength, selective and dynamic control of the incident light. The coherent control of plasmonic nanoantennas using this approach shows an almost zero crosstalk. This approach is applicable even in the presence of large transmission aberrations, such as present in holographic diffusers and multimode fibres. The method presents a paradigm shift for the addressing of plasmonic nanostructures by light.
authors: SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, UK.
authors: Sebastian
authors: S
authors: Kosmeier
authors: Anna Chiara
authors: AC
authors: De Luca
authors: Svetlana
authors: S
authors: Zolotovskaya
authors: Andrea
authors: A
authors: Di Falco
authors: Kishan
authors: K
authors: Dholakia
authors: Michael
authors: M
authors: Mazilu
mesh_terms: D015374:Biosensing Techniques; D004574:Electromagnetic Fields; D006046:Gold / Q000737:chemistry*; D008962:Models, Theoretical; D049329:Nanostructures / Q000737:chemistry*; D052898:Optical Tweezers; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance
chemical_list: D006046:Gold
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