1. Department of Electrical and Computer Engineering, University of Ottawa, Ottawa, ON, Canada, K1N 6N5
2. Institute of Materials Science and Engineering, Washington University in Saint Louis, St. Louis, Missouri 63130, United States
3. Department of Physics, University of Ottawa, Ottawa, ON, Canada, K1N 6N5
4. Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131, Karlsruhe, Germany
5. Institute of Optics, University of Rochester, 275 Hutchison Rd, Wilmot Bldg, Rochester, New York 14620, United States