太赫兹片状平顶波束产生研究  

Research on the Generation of Terahertz Sheet-Like Flat-Top Beam

作　　者：彭进宇 徐振业 郝从静 王可嘉 杨振刚 刘劲松 沈思诗 PENG Jin-yu;XU Zhen-ye;HAO Cong-jing;WANG Ke-jia;YANG Zhen-gang;LIU Jin-song;SHEN Si-shi(National Laboratory of Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China;Research Institute for Special Structures of Aeronautical Composites of AVIC,Jinan 250023,China;Beijing Great Wall Aviation Measurement and Control Technology Research Institute,Aviation Industry Corporation of China,Bejing 100111,China)

机构地区：[1]华中科技大学武汉光电国家研究中心,湖北武汉430074 [2]航空工业济南特种结构研究所,山东济南250023 [3]中国航空工业集团公司北京长城航空测控技术研究所,北京100111

出　　处：《光学与光电技术》2024年第4期28-34,共7页Optics & Optoelectronic Technology

摘　　要：为了将太赫兹发射源发射出的高斯波束整形为片状平顶波束,提出一种利用双相位板-太赫兹光片级联结构系统对波束进行整形的设计方法。理论设计上,首先运用Input-Output算法设计出能将高斯波束整形为平顶波束的双相位板,再将平顶波束通过太赫兹光片二次整形,以获取片状平顶波束。在理论设计的同时进行了数值仿真并搭建实验系统,结果均表明该系统可以将0.33 THz太赫兹源发射出的高斯波束转化为空间中呈薄片状分布的平顶波束。本次实验所产生的片状平顶波束相对方均根达到71.41%,充分说明了设计的有效性。For the purpose of shaping terahertz Gaussian beam transmitted by the terahertz transmitter into a terahertz sheetlike flat-top beam,this article proposes a method of designing which combines a dual-phase plates with a terahertz lightsheet to shape beam.In theoretical design,we first use the input-output algorithm to design a dual-phase plates that can shape Gaussian beams into flat-top beam,and then shape the flat-top beam to a sheet-like flat-top beam through terahertz light-sheet.Numerical simulation was conducted and an experimental system was built at the same time of theoretical design.The results all indicate that the system can convert the Gaussian beam transmitted by 0.33 THz terahertz transmitter into a flat-top beam with a sheet-like distribution in space.The relative root mean square reaches 71.41% for the sheet-like flat-top beam obtained in this experiment which fully demonstrates the effectiveness of the design.

关 键 词：太赫兹 高斯波束 波束整形 平顶波束 片状波束 

分 类 号：O441.4[理学—电磁学]