It will soon be three weeks that we have the pleasure to welcome a new brasilian student in the lab, Arthur Fonseca. He is currently doing a phD at the Physics Institute of the Federal University of Rio de Janeiro, under the supervision of Pr. Paulo Maia Neto. He is doing experimental and theoretical studies on vortex beams and light-matter interaction in optical tweezers. Arthur will stay 6 months among us, welcome to him !