"Nanoscale Spatial Control of Light in Optical Antennas"

Nanoscale Spatial Control of Light in Optical Antennas

Giorgio Volpe
Institut Langevin, ESPCI

The dynamic and deterministic control of light over space and time on the
sub-wavelength scale is a key requirement in order to extend concepts and
functionalities of macro-optics down to the nanometer scale. Unfortunately,
the limit of diffraction of light hampers our ability to selectively
optically address nanoscale features separated by less than half the
wavelength of light.

Plasmonic metallic nanoantennas can efficiently couple to propagating
light and concentrate it into nanometer volumes, and vice versa.
Learning how to accurately control the optical response of these
nanoantennas, therefore, represents a very promising approach to the
control of the distribution of light fields over space and time on the
nanometer scale.

After reviewing the main approaches that have been followed in order
to control the optical response of plasmonic nanoantennas, I will
expand on the state of the art by talking about some new tools, both
experimental and theoretical, that we developed in order to extend the
level of control we have over the spatial distribution of light on the
sub-wavelength scale.

Date: January 30, 2013 (Wednesday)
Time: 16:00-17:00
Place: SA240