作者机构:[1]State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China, [2]Nanophotonics and Metrology Laboratory, Swiss Federal Institute of Technology Lausanne (EPFL), CH-1015 Lausanne, Switzerland
相关基金:This work was supported by the National Natural Science Foundation of China (10874004, 10674009, 10821062) and National Basic Research Program of China (2007CB307001).