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arXiv 1503.06786physics.optics
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点偶极子近似对全介质超材料的适用性

Applicability of point dipoles approximation to all-dielectric metamaterials

S. M. Kuznetsova, A. Andryieuski, A. V. Lavrinenko

摘要:

由低介电基质中的高介电夹杂物组成的全介电超材料被认为是谐振金属基超材料的低损耗替代品。在这篇文章中,我们研究了点电偶极子和磁偶极子近似对介电超原子的适用性,以介电环超材料为例。尽管高介电元原子的电尺寸很大,但偶极子近似允许精确预测直径高达晶格常数约0.8的环的超材料性质。研究结果为全介质超材料的设计和优化提供了重要指导。

英文摘要:

All-dielectric metamaterials consisting of high-dielectric inclusions in a low-dielectric matrix are considered as a low-loss alternative to resonant metal-based metamaterials. In this contribution we investigate the applicability of the point electric and magnetic dipoles approximation to dielectric meta-atoms on the example of a dielectric ring metamaterial. Despite the large electrical size of high-dielectric meta-atoms, the dipole approximation allows for accurate prediction of the metamaterials properties for the rings with diameters up to ~0.8 of the lattice constant. The results provide important guidelines for design and optimization of all-dielectric metamaterials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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