表面波振荡0.22 THz大功率太赫兹源设计

Design of 0.22 THz high power source with structure of surface-wave oscillator

摘要: 为研制大功率紧凑型太赫兹源，开展了0.22 THz大功率太赫兹源的理论设计研究。THz源采用表面波振荡器结构。重点研究了慢波结构对太赫兹源产生信号的影响，并对慢波结构进行了优化。结合二极管参数的选取，对该源结构进行了粒子模拟，结果表明：在馈入电压200 kV，电流2900 A的条件下，输出信号频率为0.22 THz，输出功率为19.5 MW，效率约为3.3%。

Abstract: In order to develop the compact high-power terahertz (THz) source, a 0.22 THz source is designed theoretically by adopting the structure of surface-wave oscillator (SWO). We focus on the influence of the slow-wave structure (SWS) on resonant frequency and optimization of the SWS. Combined with the choose of diode, the particle-in-cell (PIC) simulation is performed for the source. The results show that the optimum structure can work stably and generate a terahertz signal in the condition of a input voltage of 200 kV, a current of 2900 A, and a guiding magnetic field of 5 T. The resonant frequency of the output signal is about 0.22 THz, and the output power reaches 19.5 MW with its efficiency of about 3.3%.