Bi K, Huang K, Zeng L Y, Zhou M H, Wang Q M, Wang Y G, Lei M
State Key Laboratory of Information Photonics and Optical Communications & School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China.
PLoS One. 2015 May 20;10(5):e0127331. doi: 10.1371/journal.pone.0127331. eCollection 2015.
A ferrite-dielectric metamaterial composed of dielectric and ferrite cuboids has been investigated by experiments and simulations. By interacting with the electromagnetic wave, the Mie resonance can take place in the dielectric cuboids and the ferromagnetic precession will appear in the ferrite cuboids. The magnetic field distributions show the electric Mie resonance of the dielectric cuboids can be influenced by the ferromagnetic precession of ferrite cuboids when a certain magnetic field is applied. The effective permittivity of the metamaterial can be tuned by modifying the applied magnetic field. A good agreement between experimental and simulated results is demonstrated, which confirms that these metamaterials can be used for tunable microwave devices.
一种由电介质和铁氧体长方体组成的铁氧体-电介质超材料已通过实验和模拟进行了研究。通过与电磁波相互作用，电介质长方体中会发生米氏共振，铁氧体长方体中会出现铁磁进动。磁场分布表明，当施加一定磁场时，铁氧体长方体的铁磁进动会影响电介质长方体的电米氏共振。通过改变施加的磁场，可以调节超材料的有效介电常数。实验结果与模拟结果显示出良好的一致性，这证实了这些超材料可用于可调谐微波器件。
