1. Center for Micro-Photonics, Swinburne University of Technology, John St., Hawthorn, Victoria 3122, Australia
2. Department of Laser Technologies, Center for Physical Sciences and Technology, Savanoriu Ave. 231, LT-02300 Vilnius, Lithuania
3. Australian Future Fibers Research and Innovation Centre, Institute for Frontier Materials, Deakin University, Geelong, Victoria 3220, Australia
4. Melbourne Centre for Nanofabrication, The Victorian Node of the Australian National Fabrication Facility, 151 Wellington Rd., Clayton, Victoria 3168, Australia