1. Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2. Instituto de Física de São Carlos, Universidade de São Paulo (USP), C.P. 369,
CEP, 13566-590 São Carlos, São Paulo, Brazil
3. Institut für Physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstr. 30, D-48149 Münster, Germany