Rui Min, a pre doctor researcher from ITEAM, Universitat Politècnica de València (Spain), made a stay in the Chalmers University of Technology (Sweden), under the supervision of Prof. Victor Torres Company, aiming to investigate the thermo-optic control of silicon rich silicon nitride high Q microresonators and microresonator frequency comb generation. During his mission, he worked on measure the thermo optics speed of silicon rich silicon nitride microresonators.