Efficient light upconversion via resonant exciton-exciton annihilation of dark excitons in few-layer transition metal dichalcogenides

Y Yi-Hsun Chen P Ping-Yuan Lo K Kyle W. Boschen C Chih-En Hsu (Mork Family Department of Chemical Engineering and Materials Science, University of Southern California) Y Yung-Ning Hsu L Luke N. Holtzman G Guan-Hao Peng C Chun-Jui Huang M Madisen Holbrook (Department of Physics) W Wei-Hua Wang K Katayun Barmak J James Hone P Pawel Hawrylak H Hung-Chung Hsueh (Department of Physics, Tamkang University) J Jeffrey A. Davis S Shun-Jen Cheng M Michael S. Fuhrer S Shao-Yu Chen (Department of Chemical Engineering)