Deterministic subwavelength control of light confinement in nanostructures.

We propose a novel deterministic protocol, based on continuous light flows, that enables us to control the concentration of light in generic plasmonic nanostructures. Based on an exact inversion of the response tensor of the nanosystem, the so-called deterministic optical inversion protocol provides a physical solution for the incident field leading to a desired near-field pattern, expressed in the form of a coherent superposition of high-order beams. We demonstrate the high degree of control achieved on complex plasmonic architectures and quantify its efficiency and accuracy.