An analog of double electromagnetically induced transparency with extremely high group indexes  

作　　者：杨安 闫长春 田洁冰 王成 李贵明 张道华 

机构地区：[1]School of Physics and Electronic Engineering,Jiangsu Normal University [2]School of Electrical and Electronic Engineering,Nanyang Technological University

出　　处：《Chinese Optics Letters》2013年第5期46-48,共3页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.BK2011203);the Graduate Innovation Project of Jiangsu Province(No.CXLX110908);the Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions,China

摘　　要：An asymmetric metamaterial exhibiting an analog of double electromagnetically induced transparency （EIT） in the middle-infrared region is reported. The metamaterial consists of two-layered arrays of Ushaped rings embedded in a medium, with the lower layer rotated by 90°. Our simulations demonstrate that both maximum group indexes are extremely high at the two EIT-like positions. The group index reaches about thrice the currently reported maximum value at the high-frequency EIT-like position. The transmittance at the two transparency positions also possesses extremely high Q factors, which is conducive to controlling the propagation of electromagnetic waves.An asymmetric metamaterial exhibiting an analog of double electromagnetically induced transparency （EIT） in the middle-infrared region is reported. The metamaterial consists of two-layered arrays of Ushaped rings embedded in a medium, with the lower layer rotated by 90°. Our simulations demonstrate that both maximum group indexes are extremely high at the two EIT-like positions. The group index reaches about thrice the currently reported maximum value at the high-frequency EIT-like position. The transmittance at the two transparency positions also possesses extremely high Q factors, which is conducive to controlling the propagation of electromagnetic waves.

关 键 词：Electromagnetic wave propagation METAMATERIALS 

分 类 号：O441.3[理学—电磁学]