1. Centre de Nanosciences et de Nanotechnologies (C2N-Marcoussis), CNRS, Route de Nozay, 91460 Marcoussis, France
2. School of Electronic Engineering, Dublin City University, Glasnevin, Dublin 9, Ireland
3. III-V Lab, A Joint Laboratory of “Nokia,” “Thales Research” and “CEA-LETI,” 91120 Palaiseau, France
4. National Research University of Information Technologies, Mechanics and Optics, Saint Petersburg 197101, Russia