1. Photonics Devices and Systems Group Singapore University of Technology and Design 8 Somapah Rd. Singapore 487372 Singapore
2. Silicon Photonics Department Nokia Bell Labs 600 Mountain Avenue New Providence NJ 07974 USA
3. Institute of Microelectronics A*STAR 2 Fusionopolis Way, #08-02, Innovis Tower Singapore 138634 Singapore
4. Institute of Photonics and Optical Science School of Physics The University of Sydney Sydney NSW 2006 Australia
5. The University of Sydney Nano Institute (Sydney Nano) The University of Sydney Sydney NSW 2006 Australia