Inverse design on terahertz multilevel diffractive lens based on 3D printing[Invited]  

作　　者：石晨雨 王宇 刘琼峻 陈赛 赵蔚鹏 吴晓君 程洁嵘 常胜江 Chenyu Shi;Yu Wang;Qiongjun Liu;Sai Chen;Weipeng Zhao;Xiaojun Wu;Jierong Cheng;Shengjiang Chang(School of Electronic Information Engineering,Beihang University,Beijing 100191,China;Institute of Modern Optics,Nankai University,Tianjin 300350,China)

机构地区：[1]School of Electronic Information Engineering,Beihang University,Beijing 100191,China [2]Institute of Modern Optics,Nankai University,Tianjin 300350,China

出　　处：《Chinese Optics Letters》2023年第11期45-50,共6页中国光学快报（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2022YFA1604402);the National Natural Science Foundation of China(NSFC)(Nos.62375011,62005140,92250307,61831012,and 62175118)。

摘　　要：Terahertz(THz)lenses have numerous applications in imaging and communication systems.Currently,the common THz lenses are still based on the traditional design of a circular convex lens.In this work,we present a method for the design of a 3D-printed multilevel THz lens,taking advantage of the benefits offered by 3D printing technology,including compact size,lightweight construction,and cost-effectiveness.The approach utilizes an inverse design methodology,employing optimization methods to promise accurate performance.To reduce simulation time,we employ the finite-difference time-domain method in cylindrical coordinates for near-field computation and couple it with the Rayleigh-Sommerfeld diffraction theory to address far-field calculations.This technology holds great potential for various applications in the field of THz imaging,sensing,and communications,offering a novel approach to the design and development of functional devices operating in the THz frequency range.

关 键 词：THz lens 3D printing achromatic lens THz communication 

分 类 号：O441.4[理学—电磁学] TP391.73[理学—物理]