From electromagnetically induced transparency to absorption in planar optical metamaterials  

作　　者：那波 史金辉 关春颖 王政平 

机构地区：[1]Key Laboratory of In-Fiber Integrated Optics of Ministry of Education,College of Science,Harbin Engineering University [2]State Key Laboratory of Millimeter Waves,Southeast University

出　　处：《Chinese Optics Letters》2013年第11期62-67,共6页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61201083,61275094,and U1231201);the Natural Science Foundation of Heilongjiang Province in China(No.LC201006);the ChinaPostdoctoral Science Foundation(Nos.2012M511171and 2013T60487);the Special Foundation for HarbinYoung Scientists(No.2012RFLXG030);the Fundamental Research Funds for the Central Universities,and the 111 Project of the Harbin Engineering University(No.B13015)

摘　　要：We theoretically investigate the classical analog of electromagnetically induced transparency （EIT） and electromagnetically induced absorption （EIA） in a planar metamaterial at optical frequency, which origi- hates from destructive and constructive interference between dark and radiative elements. The metama- terial consists of two coupled resonators with different geometries. An EIT-like transparent window with low absorption is observed and found to be strongly affected by resonant states of the resonators. The transition between the EIT and EIA is achieved by changing the split width and coupling distance. The absorption is enhanced up to 2.5 times compared with the dipolar case. The excitation of the dark mode is very important for EIT- and EIA-like responses of the proposed metamaterial. The EIT and EIA phenom- ena offer a potential method for manipulating electromagnetic response in metamaterial-based devices.We theoretically investigate the classical analog of electromagnetically induced transparency （EIT） and electromagnetically induced absorption （EIA） in a planar metamaterial at optical frequency, which origi- hates from destructive and constructive interference between dark and radiative elements. The metama- terial consists of two coupled resonators with different geometries. An EIT-like transparent window with low absorption is observed and found to be strongly affected by resonant states of the resonators. The transition between the EIT and EIA is achieved by changing the split width and coupling distance. The absorption is enhanced up to 2.5 times compared with the dipolar case. The excitation of the dark mode is very important for EIT- and EIA-like responses of the proposed metamaterial. The EIT and EIA phenom- ena offer a potential method for manipulating electromagnetic response in metamaterial-based devices.

关 键 词：METAMATERIALS Optical materials 

分 类 号：O441.3[理学—电磁学]