【摘要】 研究了一种光子晶体的慢波结构，通过对该结构的色散、场分布和粒子模拟计算，设计和仿真了一个0.28-THz的带状注返波管。在阴极电流密度仅10 A/cm~2(最小可低于6 A/cm~2)，电压12.5 kV，磁场0.5 T的情况下，该结构通过与带状电子注浸没式互作用，输出功率为435 mW。在此基础上，采用了LIGA加工技术制备了该慢波结构。研究表明，光子晶体结构能有效提高互作用效率和降低起振电流密度，有效提高太赫兹真空电子器件阴极的使用寿命，是提高太赫兹真空辐射源性能的一种有效途径。更多还原

【Abstract】 This article explores a photonic column array slow-wave structure(SWS). A 0.28-THz sheet beam backward-wave oscillator(BWO) was designed and simulated by calculating the dispersion, field distribution and particle simulation. When the cathode current density is only 10 A/cm~2(the minimum is less than 6 A/cm~2), the voltage is 12.5 kV and the magnetic field is 0.5 T, the structure interacts with the sheet beam by immersion and the output power is 435 m W. On the basis of previous work, the SWS was fabricated using LithographyGalvanoformung-Abformung(LIGA) fabrication technology. The results show that the column array structure can effectively improve the interaction efficiency and reduce the starting current density; and effectively improve the lifespan of terahertz(THz) vacuum electron device(VED) cathodes, which is a viable means of increasing the performance of THz vacuum radiation sources.更多还原