Ultra-narrow resonances and near-field energy density enhancement in planar cross-linked metamaterials

作者：Shi, Jinhui^*; Guan, Chunying; Wang, Zhengping

来源：Photonics and Nanostructures-Fundamentals and Applications, 2011, 9(3): 255-260.

DOI：10.1016/j.photonics.2011.04.010

• Metamaterials
• Trapped-mode resonance
• Electromagnetic optics
• Field enhancement

We theoretically predict ultra-narrow resonances in planar cross-linked positive and negative metamaterials at normal incidence. The microwave metamaterials composed of cross-linked asymmetrically split rings or apertures with quartz substrate are utilized to investigate the resonant response to incident electromagnetic waves. The trapped-mode resonant feature results from the excitation of an antisymmetric current mode due to the broken symmetry between two resonators. The quality factor and near-field energy density enhancement strongly depend on the asymmetry. For optimized structure parameters the metamaterial on quartz substrate shows a quality factor of about 1000 and an energy density enhanced factor of up to 150,000.

• 出版日期2011-7
• 单位哈尔滨工程大学