Orateur
Prof.
Brahim Lounis
(LP2N, Institut d'Optique, Bordeaux)
Description
These last years, some new techniques have overcome the diffraction limit of spatial resolution in
microscopy, which was described by the Abbe’s criterion. Some experimental procedures are
based on the ability to isolate the emission of a single nano-object, giving rise to very useful
methods for the tracking of bio-objects. Some others use very tiny tips to diffract near field into
propagating modes. At last, hyper resolution methods like STED or STORM, whose inventions
were rewarded by the 2014 Nobel prize in chemistry, use nonlinear response or photo activation of
molecule to address single nano-objects. These new microscopy techniques allow us to take
optics to the nanometer spatial scale.
