1. Centre for Ultrahigh
Bandwidth
Devices for Optical Systems (CUDOS), Laser Physics Centre, Research
School of Physics and Engineering, Australian National University, Canberra ACT 0200, Australia
2. Department of Applied Physics, Chongqing University, Chongqing 401331, P. R. China
3. College of Information Science
and Engineering, Ningbo University, Ningbo
315211, P. R. China