[1] A. K. Geim, K. S. Novoselov. The rise of grapheme. Nat. Mater., 6, 183-191(2007).
[54] A. K. Geim, I. V. Grigorieva. Van der Waals heterostructures. Nature, 499, 419-425(2013).
[61] C. Liu, H. P. Li, G. L. Deng, C. Y. Lan, C. Li, Y. Liu. Femtosecond Er-doped fiber laser using a graphene/MoS2 heterostructure saturable absorber. Asia Communications and Photonics Conference, 129, AF2A(2016).
[62] W. X. Du, H. P. Li, C. Liu, S. N. Shen, C. Y. Lan, C. Li, Y. Liu. Ultrafast pulse erbium-doped fiber laser with a graphene/WS2 heterostructure saturable absorber. Proc. SPIE, 10457, 104571M(2017).
[66] P. E. Blöchl. Projector augmented-wave method. Phys. Rev. B, 50, 17953-17979(1994).