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研究了高增益砷化镓光导开关中电流丝的自发辐射能量。从砷化镓光导开关中电流丝的非平衡载流子复合出发,导出了电流丝的自发辐射能量公式,建立了电流丝自发辐射的理论模型。在电流丝达到稳定状态的条件下,计算了电流丝一端的辐射波长为875nm和四个峰值波长的自发辐射能量,其中峰值波长890nm的最大光输出能量与实验观察结果吻合,合理解释了电流丝的自发辐射现象,对应用这个模型计算其他辐射波长的光输出能量给予了支持,为进一步深入定量分析电流丝辐射的光致电离效应奠定了基础。
The spontaneous emission energy of current filaments in high gain GaAs photoconductive switches was investigated. Starting from the non-equilibrium carrier recombination of the current filaments in the gallium arsenide photoconductive switch, the spontaneous radiation energy formula of the current filament is deduced, and the theoretical model of the spontaneous emission of the current filament is established. Under the conditions that the current reaches a steady state, the spontaneous emission energy of 875nm and four peak wavelengths at one end of the current filament is calculated. The maximum light output energy at the peak wavelength of 890nm agrees well with the experimental observation, This model supports the calculation of the light output energy of other radiation wavelengths, which lays the foundation for further quantitative analysis of the photoionization effect of the current wire radiation.