Far- and Near-Field Broad-Band Magneto-Optical Functionalities Using Magnetoplasmonic Nanorods

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• 作者：Gaspar Armelles ; Alfonso Cebollada ; Fernando García ; Antonio García-MartínNuno de Sousa
• 刊名：ACS Photonics
• 出版年：2016
• 出版时间：December 21, 2016
• 年：2016
• 卷：3
• 期：12
• 页码：2427-2433
• 全文大小：575K
• ISSN：2330-4022

文摘

We have performed a systematic study of magnetoplasmonic Au/Co/Au nanorods with different long/short axes ratio arranged in a disordered fashion but with the same spatial orientation of their axes. We show that the magneto-optical response can be tuned from the visible to the near-infrared range by changing the long/short axes ratio. Moreover, the analysis of the magnetic field induced polarization conversion indicates a different behavior for the far field and for the near field. In particular, the far-field polarization conversion of the nanorod does not depend on the incident polarization, whereas the near field does. This anticipates direct consequences for near-field interactions, since the interacting elements at different spatial positions could give rise to different magneto-optical responses.