1. The Key Laboratory of Weak Light Nonlinear Photonics; Ministry of Education; School of Physics and TEDA Institute of Applied Physics; Nankai University; Tianjin 300071 China
2. Beijing National Laboratory for Condensed Matter Physics; Institute of Physics; Chinese Academy of Sciences; P.O. Box 603 Beijing 100190 China
3. The collaborative Innovation Center of Extreme Optics; Shanxi University; Taiyuan Shanxi 030006 China
4. Institute of Photonics and Quantum Sciences; School of Engineering and Physical Sciences; Heriot-Watt University; Edinburgh EH14 4AS UK