Optimization of terahertz monolithic integrated frequency multiplier based on trap-assisted physics model of THz Schottky barrier varactor  

作　　者：Lu-Wei Qi Jin Meng Xiao-Yu Liu Yi Weng Zhi-Cheng Liu De-Hai Zhang Jing-Tao Zhou Zhi Jin 祁路伟;孟进;刘晓宇;翁祎;刘志成;张德海;周静涛;金智(Institute of Microelectronics of the Chinese Academy of Sciences,Beijing 100029,China;National Space Science Center,the Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]Institute of Microelectronics of the Chinese Academy of Sciences,Beijing 100029,China [2]National Space Science Center,the Chinese Academy of Sciences,Beijing 100190,China [3]University of Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Chinese Physics B》2020年第10期308-314,共7页中国物理B（英文版）

摘　　要：The optimization of high power terahertz monolithic integrated circuit (TMIC) is systemically studied based on the physical model of the Schottky barrier varactor (SBV) with interface defects and tunneling effect. An ultra-thin dielectric layer is added to describe the extra tunneling effect and the damping of thermionic emission current induced by the interface defects. Power consumption of the dielectric layer results in the decrease of capacitance modulation ration (Cmax/Cmin), and thus leads to poor nonlinear C–V characteristics. The proposed Schottky metal-brim (SMB) terminal structure could improve the capacitance modulation ration by reducing the influence of the interface charge and eliminating the fringing capacitance effect. Finally, a 215 GHz tripler TMIC is fabricated based on the SMB terminal structure. The output power is above 5 mW at 210–218 GHz and the maximum could exceed 10 mW at 216 GHz, which could be widely used in terahertz imaging, radiometers, and so on. This paper also provides theoretical support for the SMB structure to optimize the TMIC performance.

关 键 词：C-V characteristic physics-based model terahertz monolithic integrated circuit(TMIC) Schottky barrier varactor 

分 类 号：TN311.7[电子电信—物理电子学] TN771