Charge-Induced Second-Harmonic Generation in Bilayer WSe2 Yu, Huakang ; Talukdar, Deep ; Xu, Weigao ; Khurgin, Jacob B. ; Xiong, Qihua Abstract Publication: Nano Letters Pub Date: August 2015 DOI: 10.1021/acs.nanolett.5b02547 Bibcode: 2015NanoL..15.5653Y