Xiao Youpeng, Mo Chuanlan, Qiu Chong, et al. The aging characteristics of GaN-based blue LED on Si substrate [J]. Chin. J. Lumin. (发光学报), 2010, 31 (3):364-368 (in Chinese).[2] Xiong Yijing, Zhang Meng, Xiong Chuanbing, et al. Investigation of strain of GaN light-emitting diode films transferred to metal substrate from Si(111) [J]. Chin. J. Lumin. (发光学报), 2010, 31 (4):531-537 (in Chinese).[3] Chen Guichu, Fan Guanghan. Effect of Al composition on the properties of GaN-based quantum cascade laser [J]. Chin. J. Lumin. (发光学报), 2009, 30 (4):473-476 (in Chinese).[4] Ryu Han-Youl, Ha Kyoung-Ho, Chae Jung-Hye, et al. Measurement of junction temperature in GaN-based laser diodes using voltage-temperature characteristics [J]. Appl. Phys. Lett., 2005, 87 (9):093506-1-3.[5] Mishra U K, Parikh P, Wu Y F. AlGaN/GaN HEMTsan overview of device operation and applications [J]. Proceedings of the IEEE, 2002, 90 (6):1022-1031.[6] Wu Y F, Saxler A, Moore M, et al. 30-W/mm GaN HEMTs by field plate optimization [J]. Electron Device Lett. IEEE, 2004, 25 (3):117-119.[7] Zhou Mei, Zhao Degang. Effect of structure parameters on the performances of GaN Schottky barrier ultraviolet photodetectors and device design [J]. Chin. J. Lumin. (发光学报), 2009, 30 (6):824-831 (in Chinese).[8] Zhao Z M, Jiang R L, Chen P, et al. Metal-semiconductor-metal GaN ultraviolet photodetectors on Si(111) [J]. Appl. Phys. Lett., 2000, 77 (3):444-446.[9] Szweda R. GaN and SiC detectors for radiation and medicine [J]. Ⅲ-Vs Review, 2005, 18 (7):40-41.[10] Sellin P J, Vaitkus J. New materials for radiation hard semiconductor detectors [J]. Nuclear Instruments and Methods in Physics Research Section A:Accelerators, Spectrometers, Detectors and Associated Equipment, 2006, 557 (2):479-489.[11] Vaitkus J, Cunningham W, Gaubas E, et al. Semi-insulating GaN and its evaluation for particle detection [J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2003, 509 (1-3):60-64.[12] Grant J, Bates R, Cunningham W, et al. GaN as a radiation hard particle detector [J]. Nuclear Instruments and Methods in Physics Research Section A:Accelerators, Spectrometers, Detectors and Associated Equipment, 2007, 576 (1):60-65.[13] Duboz Jean-Yves, Lauegt Marguerite, Schenk David, et al. GaN for X-ray detection [J]. Appl. Phys. Lett., 2008, 92 (26):263501-1-3.[14] Duboz Jean-Yves, Beaumont Bernard, Reverchon Jean-Luc, et al. Anomalous photoresponse of GaN X-ray Schottky detectors [J]. J. Appl. Phys., 2009, 105 (11):114512-1-7.[15] Fu Kai, Yu Guohao, Lu Min. Time response of GaN Schottky detector for X-ray detection [J]. Atomic Energy Science and Technology (原子能科学技术), 2010, 44 (Suppl.):449-452 (in Chinese).