1. Department of Electrical Engineering, University of Nebraska—Lincoln, 209N WSEC, Lincoln, Nebraska 68588-0511, United States
2. Laser Micro/Nano Fabrication Laboratory,
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 10008, China
3. Université Bordeaux
1, Institut de Chimie de la Matière Condensée de Bordeaux
(ICMCB), CNRS, 33608 Pessac, France