1. LGEP, CNRS UMR8507, SUPELEC, Univ Paris-Sud, Sorbonne Universités - UPMC, Univ Paris 06, 11 rue Joliot-Curie, Plateau de Moulon, 91192 Gif-sur-Yvette Cedex, France
2. Department of Electronic Engineering, Chang Gung University, No. 259, Wen-Hua 1st Rd, Kweishan, Taoyuan 333, Taiwan
3. Laboratoire de Photonique et de Nanostructures (CNRS - LPN), Route de Nozay, 91460 Marcoussis, France