1. Institute of Optoelectronic Technology and the Centre for THz Research, China Jiliang University, Hangzhou, China
2. College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou, China
3. Zhejiang Smart Information Technology, Company, Ltd., Jinhua, China
4. Kaifeng Group Company, Ltd., Yongkang, China
5. Centre for THz Research, China Jiliang University, Hangzhou, China