[1] Lu Xiangyou, Hua Tsechao, Wang Yanping. Microelectronics Journal, 2011, 42(11): 1257.
[2] Li Ke, Shen Changyu. Optic-International Journal for Light and Electron Optics, 2012, 123(7): 621.
[3] Roh Heesuk, Hur Seyoon, Song Heejo, et al. Meterials Letters, 2012, 70(1): 37.