作者机构:[1]Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China
相关基金:Supported partly by the National Natural Science Foundation of China (No. 50775118), Program for New Century Excellent Talents in University (No. NCET-08-0323), and the National Key Basic Research and Development (973) Program of China (No. 2007CB714000)