Bidirectional visible light absorber based on nanodisk arrays  

作　　者：王琦 朱非凡 李瑞 张世杰 张大伟 Qi Wang;Fei-Fan Zhu;Rui Li;Shi-Jie Zhang;Da-Wei Zhang(Engineering Research Centre of Optical Instrument and System,the Ministry of Education,Shanghai Key Laboratory of Modern Optical System,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]Engineering Research Centre of Optical Instrument and System,the Ministry of Education,Shanghai Key Laboratory of Modern Optical System,University of Shanghai for Science and Technology,Shanghai 200093,China

出　　处：《Chinese Physics B》2023年第3期68-71,共4页中国物理B（英文版）

基　　金：the National Key Research and Development Program(Grant No.2022YFB2804602);Shanghai Pujiang Program(Grant No.21PJD048).

摘　　要：A perfect bidirectional broadband visible light absorber composed of titanium nitride and tungsten nanodisk arrays is proposed.The average absorption of the absorber exceeds 89%at 400 nm–800 nm when light is normally incident on the front-side.Illumination from the opposite direction(back-side)results in absorption of more than 75%.Through the theoretical analysis of the electric and magnetic fields,the physical mechanism of the broadband perfect absorption is attributed to the synergy of localized surface plasmons,propagating surface plasmons,and plasmonic resonant cavity modes.Furthermore,the absorber also exhibits excellent polarization-independence performance and a high angular tolerance of~30°for both front-and back-side incidence.The designed bidirectional broadband visible light absorber here has wide application prospects in the fields of solar cells and ink-free printing.

关 键 词：bidirectional absorption broadband absorber polarization-independent nanodisk arrays 

分 类 号：O53[理学—等离子体物理] TB383.1[理学—物理]