Autumn is the season of falling leaves but also of postdoctoral researchers arrivals and we welcomed this week Kaina Gonçalves Diniz, from Brazil. Kaina came in the context of the CAPES-COFECUB exchange program and will stay about one year in the lab. He graduated with a Bachelor’s degree in Physics from the Federal University of Rio de Janeiro, where he also completed his Master and PhD. He is primarily an experimental physicist, with a research focus on optical tweezers and their applications. He is also interested in chiral nanoparticles and has explored how these particles can be studied in the context of optical trapping. Welcome Kaina !