1. Laboratoire de Photonique Quantique et Moléculaire,
UMR 8537—CNRS, Ecole Normale Supérieure de Cachan, CentraleSupélec, Grande Voie des Vignes, 92295 Châtenay-Malabry CEDEX, France
2. Laboratory of Nanomaterials, National Center for Nanoscience and Technology, Beiyitiao No. 11, Zhongguancun, Beijing 100190, P. R. China
3. Laser Processing
Group, Instituto de Óptica, CSIC, Serrano 121, 28006 Madrid, Spain