Luogo: Aula EinsteinRelatrice: Prof.ssa Teodora Kirova - Institute of Atomic Physics and Spectroscopy, Riga, LatviaE-mail di riferimento: sandromarcel.wimberger@unipr.it Abstract:We deal with the control of atoms using structured light patterns. In the first part we will present theoretical schemes for strongly confined localization of atoms in an excitation configuration of a ladder, where a standing-wave or an optical vortex is used in the second step of the ladder. When a standing wave is used, a periodic pattern of tightly localized regions with size bellow 1 nm can be achieved. Applying a doughnut-shaped optical vortex results in ultraprecise 2D localization solely in the zero-intensity center down to the nanometer scale. Auxiliary modulation to the two-photon detuning allows for a 3D-confinement. Our calculations pave one-step closer to the development of new subwavelength localization techniques for feasible experimental applications. In the second part we will present a theoretical scheme for creating a two-dimensional Electromagnetically InducedGrating in three-level systems interacting with a weak probe field and two simultaneous coupling fields - a two-dimensional standing wave and an optical vortex beam. The analysis of the probe field energy transfer to different orders of diffraction proves the possibility of direct control over the performance of the grating
