Terahertz wide-angle metalens with nearly ideal object-image relation  

作　　者：王宇 程洁嵘 冀允允 范飞 常胜江 Yu Wang;Jierong Cheng;Yunyun Ji;Fei Fan;Shengjiang Chang(Institute of Modern Optics,Nankai University,Tianjin 300350,China;Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology,Tianjin 300350,China;Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,Tianjin 300350,China)

机构地区：[1]Institute of Modern Optics,Nankai University,Tianjin 300350,China [2]Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology,Tianjin 300350,China [3]Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,Tianjin 300350,China

出　　处：《Chinese Optics Letters》2024年第1期147-152,共6页中国光学快报（英文版）

摘　　要：Metalenses are essential components in terahertz imaging systems.However,without careful design,they show limited field of view and their practical applications are hindered.Here,a wide-angle metalens is proposed whose structure is optimized for focusing within the incident angles of±25°.Simulation and experiment results show that the focusing efficiency,spot size,and modulation transfer function of this lens are not sensitive to the incident angle.More importantly,this wide-angle metalens follows the ideal Gaussian formula for the object-image relation,which ensures a wider field of view and better contrast in the imaging experiment.

关 键 词：TERAHERTZ metalens WIDE-ANGLE Gaussian formula 

分 类 号：O441.4[理学—电磁学] TP391.41[理学—物理]