11th Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2015, Busan, South Korea, 24 - 28 August 2015, vol.2
© 2015 IEEE.The surface passivation effect on the power-loss mechanisms in AlGaN/AlN/GaN heterostructures was investigated. The electron temperatures of hot electrons was obtained from the temperature and the applied electric field dependencies of the Hall mobility.