摘要
Terahertz(THz)absorbers for imaging,sensing,and detection are in high demand.However,such devices suffer from high manufacturing costs and limited absorption bandwidths.In this study,we presented a low-cost broadband tunable THz absorber based on one-step laser-induced graphene(LIG).The laser-machining-parameter-dependent morphology and performance of the absorbers were investigated.Coarse tuning of THz absorption was realized by changing the laser power,while it was fine-tuned by changing the scanning speed.The proposed structure can achieve over 90%absorption from0.5 THz to 2 THz with optimized parameters.The LIG method can help in the development of various THz apparatuses.
作者
兰婧萱
张荣轩
白灏
章彩蝶
张绪
胡伟
王磊
陆延青
Jingxuan Lan;Rongxuan Zhang;Hao Bai;Caidie Zhang;Xu Zhang;Wei Hu;Lei Wang;Yanqing Lu(College of Electronic and Optical Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;National Laboratory of Solid State Microstructures,College of Engineering and Applied Sciences,Key Laboratory of Intelligent Optical Sensing and Manipulation,Nanjing University,Nanjing 210093,China;State Key Laboratory of Millimeter Waves,Southeast University,Nanjing 210096,China)
基金
supported by the Natural Science Foundation of Jiangsu Province(No.BK20211277)
the Natural Science Foundation of Jiangsu Province Major Project(No.BK20212004)
the China Postdoctoral Science Foundation(Nos.2019M651768 and 2020T130285)
the Fundamental Research Funds for the Central Universities(No.021314380095)
the Open Foundation of State Key Laboratory of Millimeter Waves(No.K202226)。
