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Twisted light : New state of light and its applications - Andrey Surzhykov - Mercredi 6 septembre 2017 à 14 h

INSP - UPMC - 4 place Jussieu - 75005 Paris - Barre 22-32, 2e étage, salle 201

INSP - Andrey Surzhykov - Physikalisch-Technische Bundesanstalt (Germany)

Abstract

During the last decade, light beams with a helical phase front and non-zero projection of the orbital angular momentum (OAM) onto their propagation direction have been in the focus of intense research. These so-called twisted beams are routinely produced today with photon energies ranging from meV to hundreds of eV. Twisted light is used for multiplexing in optical communications, for manipulating microparticles, and for studying the angular momentum transfer to atoms, molecules or even BEC’s. In my talk, I will review recent theoretical advances in studying fundamental light-matter interaction processes involving OAM beams. We will discuss, in particular, how the OAM of twisted photons can affect the selection rules of bound-state radiative transitions as well as the angular distribution of emitted photoelectrons.