Critical route for coherent perfect absorption in a Fano resonance plasmonic system

被引：47
作者：
Kang, Ming [1 ,2 ]
Chong, Y. D. [3 ,4 ]
Wang, Hui-Tian [1 ,2 ,5 ,6 ]
Zhu, Weiren [7 ]
Premaratne, Malin [7 ]
机构：
[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[2] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
[3] Nanyang Technol Univ, Sch Phys & Math Sci, Singapore 637371, Singapore
[4] Nanyang Technol Univ, Ctr Disrupt Photon Technol, Singapore 637371, Singapore
[5] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China
[6] Nankai Univ, MOE Key Lab Weak Light Nonlinear Photon, Tianjin 300071, Peoples R China
[7] Monash Univ, Dept Elect & Comp Syst Engn, Adv Comp & Simulat Lab AxL, Clayton, Vic 3800, Australia
来源：
APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 13期
基金：
中国博士后科学基金; 澳大利亚研究理事会; 中国国家自然科学基金; 新加坡国家研究基金会;
关键词：
INDUCED TRANSPARENCY; METAMATERIALS; REFLECTION; REFRACTION; LIGHT;
D O I：
10.1063/1.4896972
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We develop a method for realizing coherent perfect absorption in thin metamaterial systems, based on the coupled-mode theory of Fano resonance. Coherent perfect absorption refers to the complete absorption of symmetric plane waves incident on opposite sides of the system, due to critical coupling into the dissipative degrees of freedom. Using the reflection and transmission spectra measured on a limited number of samples, our theory predicts the precise frequency and metamaterial parameter values required to achieve coherent perfect absorption. The coupled-mode theory and the design method are found to agree well with full-wave numerical simulations of a subwavelength-thickness metamaterial surface with a pair of bright and dark plasmonic modes. (C) 2014 AIP Publishing LLC.
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页数：5
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