All-Dielectric Rod-Type Metamaterials at Optical Frequencies
All-Dielectric Rod-Type Metamaterials at Optical Frequencies
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DOI：
10.1103/physrevlett.102.133901
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发表时间：
2009-04-03
影响因子：
8.6
通讯作者：
Guizal, B.
中科院分区：
文献类型：
--
作者：
Vynck, K.;Felbacq, D.;Guizal, B.
从理论上研究了光在全介质棒状超材料中的传输。在长波极限下，对杆的电偶极矩和磁偶极矩进行了解析推导。通过均匀化偶极子阵列，计算了正方形杆阵的有效介电常数和磁导率。解释了偶极共振在杆阵光学性质中的作用。这种结构被发现表现出真正的左撇子行为，证实了以前的实验[L.Peng，Phys.莱特牧师。98、157403(2007年)]。标度分析表明，这种效应在光学频率下仍然有效，并且可以通过使用例如由硅制成的棒来获得。
Light propagation in all-dielectric rod-type metamaterials is studied theoretically. The electric and magnetic dipole moments of the rods are derived analytically in the long-wavelength limit. The effective permittivity and permeability of a square lattice of rods are calculated by homogenizing the corresponding array of dipoles. The role of dipole resonances in the optical properties of the rod array is interpreted. This structure is found to exhibit a true left-handed behavior, confirming previous experiments [L. Peng , Phys. Rev. Lett. 98, 157403 (2007)]. A scaling analysis shows that this effect holds at optical frequencies and can be obtained by using rods made, for example, of silicon.