1. State Key Laboratory of Millimeter WavesSoutheast UniversityNanjing210096People's Republic of China
2. Institute of MicroelectronicsA*STAR (Agency for Science, Technology and Research)Singapore117685Singapore
3. School of Electrical and Electronic EngineeringNanyang Technological UniversitySingapore639798Singapore
4. Terahertz Research CentreChina Academy of Engineering PhysicsChengdu611731People's Republic of China
5. MEDIWAVE LLCGreenvilleNC27834USA