1. State Key Laboratory of Integrated Optoelectronics; College of Electronic Science and Engineering; Jilin University; Changchun 130012 China
2. State Key Lab of Precision Measurement Technology and Instruments; Department of Precision Instrument; Tsinghua University; Haidian Beijing 100084 China
3. Cixi Institute of Biomedical Engineering; Ningbo Institute of Materials Technology and Engineering; Chinese Academy of Sciences; Ningbo 315201 China
4. Nanooptische Konzepte für die PV; Helmholtz-Zentrum Berlin; Hahn-Meitner-Platz 1 14109 Berlin Germany
5. Istituto Italiano di Tecnologia; via Morego 30 16163 Genova Italy