XVI Symposium of Lasers and its applications

The Symposium of Lasers and its Applications is an annual scientific event promoted by OPTICA Student Chapter-Recife, dedicated to the exposition of ideas and discussions among researchers, professors, students, and professionals interested in the field of Optics. Our main objective is to disseminate the latest techniques involving the use of lasers and their applications in the fields of Physics, Medicine, Communication, among others.

About the cover art: The image shows the luminescence of NaYF microcrystals co-doped with trivalent Yb3+ (ytterbium) and Er3+ (erbium) ions due to excitation by a CW laser in the near-infrared range (977 nm). The high concentration of Yb3+ relative to Er3+ ensures greater efficiency of the energy upconversion processes, allowing the conversion of infrared light to the visible spectrum. In these microcrystals, the most likely process is a direct excitation of the Yb3+ ions by the laser, followed by an energy transfer to the Er3+ ions. This system emits light with several wavelengths, predominantly in the green range (505~557 nm). Photo by Dayvid Mello.