Magneto-Optical Activity in High Index Dielectric Nanoantennas

被引：41
作者：
de Sousa, N. [1 ,2 ,3 ]
Froufe-Perez, L. S. [4 ]
Saenz, J. J. [3 ,5 ]
Garcia-Martin, A. [6 ]
机构：
[1] Univ Autonoma Madrid, Dept Fis Mat Condensada, Condensed Matter Phys Ctr IFIMAC, E-28049 Madrid, Spain
[2] Univ Autonoma Madrid, Inst Nicolas Cabrera, E-28049 Madrid, Spain
[3] Donostia Int Phys Ctr DIPC, P Manuel de Lardizabal 4, Donostia San Sebastian 20018, Spain
[4] Univ Fribourg, Dept Phys, Chemin Musee 3, CH-1700 Fribourg, Switzerland
[5] Basque Fdn Sci, IKERBASQUE, Bilbao 48013, Spain
[6] IMM Inst Microelect Madrid CNM CSIC, PTM, Isaac Newton 8, E-28760 Madrid, Spain
来源：
SCIENTIFIC REPORTS | 2016年 / 6卷
基金：
瑞士国家科学基金会;
关键词：
DISCRETE-DIPOLE APPROXIMATION; GOLD; POLARIZABILITY; NANOPARTICLES; ANTENNAS; MODULATION; RESONANCES; EXCITATION; SHAPE; SIZE;
D O I：
10.1038/srep30803
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The magneto-optical activity, namely the polarization conversion capabilities of high-index, non-absorbing, core-shell dielectric nanospheres is theoretically analyzed. We show that, in analogy with their plasmonic counterparts, the polarization conversion in resonant dielectric particles is linked to the amount of electromagnetic field probing the magneto-optical material in the system. However, in strong contrast with plasmon nanoparticles, due to the peculiar distribution of the internal fields in resonant dielectric spheres, the magneto-optical response is fully governed by the magnetic (dipolar and quadrupolar) resonances with little effect of the electric ones.
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页数：8
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