1. Georgia Institute of Technology, School of Electrical
and Computer Engineering, GT-Lorraine, 57070 Metz, France
2. UMI 2958, Georgia
Tech - CNRS, 57070 Metz, France
3. Laboratoire
de Photonique et de Nanostructures (LPN), CNRS, Université Paris-Saclay, route de Nozay, F-91460 Marcoussis, France
4. Université de Lorraine, LMOPS, EA 4423, 57070 Metz, France