[1] K S Novoselov, A K Geim, S V Morozov. Science, 306, 666(2004).

[2] A K Geim, K S Novoselov. Nat. Mater, 6, 183(2007).

[3] A H Castro Neto, F Guinea, N M R Peres, K S Novoselov, A K Geim. Rev. Mod. Phys, 81, 109(2009).

[4] F Bonaccorso, Z Sun, T Hasan, A C Ferrari. Nat. Photon, 4, 611(2010).

[5] F J García de Abajo. ACS Photon, 1, 135(2014).

[6] B Liao, X Guo, H Hu, N Liu, K Chen, X Yang, Q Dai and. Chin. Phys. B, 27(2018).

[7] W Gao, J Shu, C Qiu, Q Xu. ACS Nano, 6, 7806(2012).

[8] J Chen, M Badioli, P Alonso-Gonzalez. Nature, 487, 77(2012).

[9] N Mou, S Sun, H Dong, S Dong, Q He, L Zhou, . Opt. Express, 26(2018).

[10] G Yao, F Ling, J Yue, C Luo, J Ji, J Yao. Opt. Express, 24, 1518(2016).

[11] S Ke, B Wang, H Huang, H Long, K Wang, P Lu. Opt. Express, 23, 8888(2015).

[12] S V Morozov, K S Novoselov, M I Katsnelson, F Schedin, D C Elias, J A Jaszczak, A K Geim. Phys. Rev. Lett, 100(2008).

[13] Y Chen, G Jiang, S Chen, Z Guo, X Yu. Opt. Express, 23(2015).

[14] L Li, Y Yu, , Q Ge, X Ou, H Wu, D Feng. Nat. Nanotech, 9, 372(2014).

[15] M Huang, M Wang, C Chen, Z Ma, X Li, J Han, Y Wu. Adv. Mate, 28, 3481(2016).

[16] Y Abate, D Akinwande, S Gamage, H Wang, M Snure, N Poudel, S B Cronin. Adv. Mater, 30(2018).

[17] C Fang, Y Liu, G Han, Y Shao, J Zhang, Y Hao. Opt. Express, 26(2018).

[18] Q Fo, P Ling, X Chen, X Quan, C Ouyang, X Zhang. IEEE Photon. J, 10, 1(2018).

[19] J Wang, Y Jiang. Opt. Express, 25, 5206(2017).

[20] J Wang, Y Jiang, Z Hu. Opt. Express, 25(2017).

[21] D T Debu, S J Bauman, D French, H O Churchill, J B Herzog. Sci. Rep, 8, 3224(2018).

[22] G Wang, L Wu, J Yan, Z Zhou, R Ma, H Yang, J Li, C Gu, L Bao, S Du, H Gao. Chin. Phys. B, 27(2018).

[23] R Hu, X Ma, C An, J Liu. Chin. Phys. B, 28(2019).

[24] Q Hong, F Xiong, W Xu, Z Zhu, K Liu, X Yuan, J Zhang, S Qin. Opt. Express, 26(2018).

[25] J Nong, W Wei, W Wang, G Lan, Z Shang, J Yi, L Tang. Opt. Express, 26, 1633(2018).

[26] Z Liu, K Aydin. Nano Lett, 16, 3457(2016).

[27] L Han, L Wang, H Xing, X Chen. Acs Photon, 5, 3828(2018).

[28] Y Wang, M Song, M Pu, Y Gu, C Hu, Z Zhao, C Wang, H Yu, X Luo. Plasmonics, 11, 1201(2016).

[29] P Chen, C Argyropoulos, M Farhat, J S Gomez-diaz. Nanophotonics, 6, 1239(2017).

[30] Y Liu, B N Shivananju, Y Wang, Y Zhang, W Yu, S Xiao, T Sun, W Ma, H Mu, S Lin, H Zhang, Y Lu, C Qiu, S Li, Q Bao. Appl. Mater. Inter, 9(2017).

[31] E H Hwang, S D Sarma. Phys. Rev. B, 75(2007).

[32] G W J Hanson. Appl. Phys, 103(2008).

[33] M Jablan, H Buljan, M Soljacic. Phys. Rev. B, 80(2009).

[34] T Low, R Roldan, H Wang, F Xia, P Avouris, L M Moreno, F Guinea. Phys. Rev. Lett, 113(2014).

[35] Z Fei, M D Goldflam, J S Wu, S Dai, M Wagner, A S McLeod, M K Liu, K W Post, S Zhu, G C A M Janssen, M M Fogler, D N Basov. Nano Lett, 15, 8271(2015).