1. State Key Laboratory for Superlattices and Microstructures; Institution of Semiconductors; Chinese Academy of Sciences; Beijing 100083 China
2. State Key Laboratory of Integrated Optoelectronics; College of Electronic Science and Engineering; Jilin University; Changchun 130012 P. R. China
3. Institute and Hospital of Hepatobiliary Surgery; Key Laboratory of Digital Hepatobiliary Surgery of Chinese PLA; Chinese PLA Medical School; Chinese PLA General Hospital; Beijing 100853 China