title: Shaping optical beams with topological charge.
abstract: We show that by spatially arranging topological charges on a phase mask, it is possible to shape the spatial intensity profile of vortex beams in a controlled manner. As proof-of-principle experiments, we generated vortex beams with the spatial shape of straight lines, corners, and triangles. Potential applications for shaped beams include selective excitation of plasmonic modes, geometrically tunable Bose-Einstein condensates, and optical tweezers.
authors: Departamento de Física, Universidade Federal de Pernambuco, Recife, Pernambuco 50670-901, Brazil.
authors: Anderson M
authors: AM
authors: Amaral
authors: Edilson L
authors: EL
authors: Falcão-Filho
authors: Cid B
authors: CB
authors: de Araújo