Affiliation: | aDTU Fotonik, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark;bWuhan National Laboratory for Optoelectronics, School of Optoelectronics Science and Engineering, HuaZhong University of Science and Technology, Wuhan 430074, Hubei, China;cDepartment of Electronic Engineering, Tsinghua University, Beijing 100084, China |