Saule Research Institute (SRI) is a foundation established to carry out research activities, primarily specializing in the field of optoelectronics. We implement modern approaches allowing young researchers to run international projects and work with scientists from all over the world. SRI activities will also cover more fundamental aspects of researched areas. It is very important for every scientific unit to find a balance between a work focused on technology development and activities allowing a better understanding of some fundamental processes occurring in a given system.