Affiliation: | 1. School of Physics, Nankai University, Tianjin, 300071 China;2. MOE Key Laboratory of Weak-Light Nonlinear Photonics and TEDA Institute of Applied Physics, Nankai University, Tianjin, 300457 China;3. School of Physics, Nankai University, Tianjin, 300071 China MOE Key Laboratory of Weak-Light Nonlinear Photonics and TEDA Institute of Applied Physics, Nankai University, Tianjin, 300457 China;4. Faculty of Physics, Vienna University, A-1090 Wien, Austria J. Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia |