金属网栅在THz激光器中的应用

来源 :湖北省物理学会、武汉物理学会2015学术年会 | 被引量 : 0次 | 上传用户:jianhua230747
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从作为微波天线的反射器开始到现在,金属网栅已被广泛地应用于THz波段[1].金属网栅既可作为THz波段的分束器和反射器以及高效滤波器件[2,也可用于构成各种频率选择器件,还可用于F-P干涉仪上来测量THz波波长和研究其频谱特性.本文使用双网栅结构正好适合作为CO2泵浦激光输入耦合器和THz波段的反射耦合器,采用电感性金属网栅作为光学谐振腔的前反射镜和输入耦合器,而采用电容性网栅作为光学谐振腔的后反射镜和输出耦合器,并调整为F-P腔式THz激光器.电感性网栅和电容性网栅结构互补,对于电容性网栅可以用来作为THz激光器中THz信号的输出耦合器和CO2泵浦激光的反射镜[3-4],而在基底材料上镀有金属网栅的透射率可以表示为.
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