电磁感应透明
超材料
不透明度
太赫兹辐射
激光线宽
慢光
物理
平面的
共振(粒子物理)
光学
光电子学
材料科学
激光器
原子物理学
光子晶体
计算机图形学(图像)
计算机科学
作者
Sher-Yi Chiam,Ranjan Singh,Carsten Rockstuhl,F. Lederer,Weili Zhang,Andrew A. Bettiol
出处
期刊:Physical Review B
[American Physical Society]
日期:2009-10-26
卷期号:80 (15)
被引量:342
标识
DOI:10.1103/physrevb.80.153103
摘要
We experimentally demonstrate at terahertz frequencies that a planar metamaterial exhibits a spectral response resembling electromagnetically induced transparency. The metamaterial unit cell consists of a split ring surrounded by another closed ring where their dimensions are such that their excitable lowest order modes have identical resonance frequencies but very different lifetimes. Terahertz time-domain spectroscopy verifies that the interference of these two resonances results in a narrow transparency window located within a broad opaque region. In contrast to previous studies this enhanced transmission is achieved by independently exciting two resonances in which their coupling to the radiation field, and thus their linewidth, differs strongly. Rigorous numerical simulations prove that the transparency window is associated with a large group index and low losses, making the design potentially useful for slow light applications. This experiment opens an avenue to explore quantum-mechanical phenomena using localized resonances in metallic structures.
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