Yanjun Han, Song Xue, Wenping Guo, Changzheng Sun,Zhibiao Hao and Yi Luo, “Characteristics of n-GaN after Cl2/Ar and Cl2/N2 inductively coupled plasma etching”, Jpn. J. Appl. Phys. Part 1, vol. 42, No. 10. pp. 6409-6412, 2003.
 Yanjun Han, Song Xue, Wenping Guo, Yi Luo, Zhibiao Hao and Changzheng Sun, “Highly selective dry etching of GaN over AlGaN using inductively coupled Cl2/N2/O2 plasmas”, Jpn. J. Appl. Phys. Part 2, vol. 42, No. 10A, pp. 1139-1141, 2003.
 Yanjun Han, Song Xue, Tong Wu, Zhen Wu, Wenping Guo, Yi Luo, Zhibiao Hao and Changzheng Sun, “Nonselective and smooth etching of GaN/AlGaN heterostructures by Cl2/Ar/BCl3 inductively coupled plasmas,” J. Vac. Sci. Technol., vol. A22, No. 2, pp. 407-412, 2004.
 Yanjun Han, Song Xue, Tong Wu, Zhen Wu, Wenping Guo, Yi Luo, Zhibiao Hao, and Changzheng Sun, “Nonselective etching of GaN/AlGaN heterostructures by Cl2/Ar/BCl3 inductive coupled plasmas,” Science in China, Series E, pp. 150-158, 2004.
 Yi Luo, Zexin Feng, Yanjun Han, Hongtao Li, “Design of compact and smooth free-form optical system with uniform illuminance for LED source”, Optics Express, Vol 18, No.9, pp9055-9063, 2010
 K. Wang, Y. J. Han, H. Li, and Y. Luo, Overlapping-based optical freeform surface construction for extended lighting source, Optics express, 21(17) (2013), 19750-19761.
 X. L. Mao, H. T. Li, Y. J. Han, and Y. Luo, Two-step design method for highly compact three-dimensional freeform optical system for LED surface light source, Optics Express, 22(106) (2014), A1491-A1506.