1. Australian National University, Nonlinear Physics Centre, Research School of Physics and Engineering, Canberra, AustraliabUniversity of Malaya, Integrated Lightwave Research Group, Department of Electrical Engineering, Kuala Lumpur, Malaysia
2. Rajshahi University of Engineering and Technology, Department of Electronics and Telecommunication Engineering, Rajshahi, Bangladesh
3. University of Birmingham, Nanotechnology Laboratory, School of Engineering, Birmingham, United Kingdom