太赫兹波衍射特性的研究  

Study of the diffraction characteristics of terahertz wave

作　　者：詹洪磊 秦凡凯 赵昆[1] 陈思同 ZHAN Hong-lei;QIN Fan-kai;ZHAO Kun;CHEN Si-tong(College of New Energy and Materials,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油大学(北京)新能源与材料学院,北京102249

出　　处：《大学物理》2020年第6期44-46,64,共4页College Physics

基　　金：中国石油大学(北京)研究生教育质量与创新工程重点项目(yjs2019005);中国石油大学(北京)"本科教学工程"重点项目(55、62);北京自然科学基金(1184016)资助.

摘　　要：利用不同宽度的衍射屏对太赫兹波的衍射特性做了分析与探究.根据太赫兹波衍射特性,将衍射屏的宽度变化划分为三个阶段.由太赫兹时域波形的时间延迟和峰值振幅参数可直观地反映出每一阶段中太赫兹波直边衍射后光程变化和光强分布规律.本实验既可作为课堂内关于光的衍射知识的延伸,又可作为衍射理论与实际相结合的例子在物理教学中应用.The diffraction characteristics of terahertz waves are analyzed and explored by using different width of diffraction screens. According to the terahertz wave diffraction characteristics, the width variation of the diffraction screen is divided into three stages. The optical path variation and intensity distribution of the terahertz wave are reflected by the time delay and peak amplitude parameters of the terahertz time-domain spectrum. The experiment can be used as an extension of the knowledge of diffraction in light in class and as an example of the combination of diffraction theory and practice in physics teaching.

关 键 词：太赫兹波 直边衍射 光程 光强 

分 类 号：O433.1[机械工程—光学工程]