Ding Yuan Chen (SweGaN AB / SE; Chalmers University of Technology / SE), Kai Hsin Wen (SweGaN AB / SE; Chalmers University of Technology / SE), Professor Mattias Thorsell (Chalmers University of Technology / SE), Dr. Martino Lorenzini (SweGaN AB / SE), Professor Hans Hjelmgren (Chalmers University of Technology / SE), Dr. Jr-Tai Chen (SweGaN AB / SE), Professor Niklas Rorsman (Chalmers University of Technology / SE)