刻划微棱锥抗反射层的GaP太赫兹波发射器
GaP terahertz emitter with micro-pyramid anti-reflection layer
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摘要: 报道了利用出射面加工有微棱锥结构抗反射层的GaP晶体THz发射器产生超快THz脉冲.基于微结构界面等效折射率渐变原理,设计并利用超精密微加工技术在GaP块状THz发射器出射面加工了亚波长微棱锥结构层,用以提高所产生的THz波的耦合输出.实验验证了该微结构层能提高所产生的THz波的耦合输出效率,并能够有效散射剩余抽运光,提高系统运转的稳定性.Abstract: We present the generation of terahertz pulses from a bulk GaP emitter fabricated with a micro-pyramid anti-reflection output coupling layer.The anti-reflection layer is designed by the graded effective refractive index principle.The micro-pyramid structure is manufactured by micro fabrication technique.The experimental results demonstrate that the micro structure layer can not only increase the output coupling efficiency but also scatter the transmitted pump power.
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