Manipulating electromagnetic wave propagation with negative-zero-positive index magnetic metamaterials

Meiling Wang; Qingtao Ba; Qilin Luo; Huabing Wu; Shiyang Liu

doi:10.1117/12.2505861

15 November 2018 Manipulating electromagnetic wave propagation with negative-zero-positive index magnetic metamaterials

Meiling Wang, Qingtao Ba, Qilin Luo, Huabing Wu, Shiyang Liu

Proceedings Volume 10964, Tenth International Conference on Information Optics and Photonics; 109642V (2018) https://doi.org/10.1117/12.2505861
Event: Tenth International Conference on Information Optics and Photonics (CIOP 2018), 2018, Beijing, China

Abstract

Based on the multiple scattering theory and effective medium theory, we demonstrate that flexibly molding the propagation of electromagnetic waves can be realized by designing magnetic metamaterials (MMs) with an array of ferrite rods. By calculating photonic band diagrams and effective constitutive parameters, it is shown that MMs can be used to achieve effective zero index with both the effective permittivity and permeability close to zero, a matched zeroindex material (MZIM). The transmitted Gaussian beam exhibit zero phase delay when it pass through the MZIM slabs with different thicknesses so that the spatial phase change of electromagnetic waves can be regulated, thereby realizing a diversity of electromagnetic wave-front modulation. In particular, the effective index of MMs can be tuned from negative to zero and to positive by controlling bias magnetic field (BMF), resulting in the switching of beam reflection and refraction. The working frequency of MZIM can also be tuned by controlling BMF, adding additional degree of freedom. Moreover, the gradient index MM can be realized by applying a gradient BMF, which can provide an additional parallel wave vector so that the direction of transmitted beam can be controlled more flexibly by controlling the gradient of BMF, which is more convenient for the designing electromagnetic devices.

Citation Download Citation

Meiling Wang, Qingtao Ba, Qilin Luo, Huabing Wu, and Shiyang Liu "Manipulating electromagnetic wave propagation with negative-zero-positive index magnetic metamaterials", Proc. SPIE 10964, Tenth International Conference on Information Optics and Photonics, 109642V (15 November 2018); https://doi.org/10.1117/12.2505861

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KEYWORDS

Magnetism

Gaussian beams

Refractive index

Metamaterials

Radio propagation

Wave propagation

Dielectrics

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