Affiliation: | [1]School of Optoelectronics, Beijing Institute of Technology; Beijing 100081, China [2]Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94132, USA [3]NSF Nanoscale Science and Engineering Center, University of California, Berkeley~ CA 94720, USA [4]Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510631, China [5]The MOE Key Laboratory of Weak Light Nonlinear Photonics and TEDA Applied Physics School, Nankai University, Tianjin 300457, China |