Fano near field imaging of optical modes

by Prof. Massimo Gurioli (ENS and Department of Physics, University of Florence, 50019 Sesto Fiorentino, Italy)

Friday 22 Jan 2016, 16:00 → 17:00 Europe/Rome

Aula Conversi (Dipartimento di Fisica - Ed. G. Marconi)

Photonic and plasmonic nanostructures allow realizing optical resonances with modal volume largely below the size of the optical wavelength, which have been already successfully exploited in many applications, from sensor to the quantum electrodynamics devices. The near field imaging of optical modes is therefore of the utmost relevance for the full control of the light matter interaction. In this talk, I will review recent results obtained in Florence by using near field Fano resonant scattering. The method can be applied to any materials, it gives deep subwavelength spatial resolution with high sensitivity and fidelity and it is intrinsically phase sensitive [1]. We exploited the versatility of the method for mapping the magnetic field by using a metallic coated [2] and plasmonic tips [3,4]. We also developed a full control of the near field polarization for realizing vectorial imaging [5] also in presence of TE-TM modes [6]. In conclusion of the talk, I will also discuss the use of near imaging in the field of light localization in random photonic system.[7]