Nonlocal Immunized Mid-Infrared Magnetic Hot Spots in Graphene Junctions |
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| Authors: | Zenghong Ma Wei Cai Lei Wang Chenglin Du Weiwei Luo Linyu Niu Shuqing Xue Mengxin Ren Xinzheng Zhang Jingjun Xu |
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| Affiliation: | 1.The Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education, School of Physics and TEDA Applied Physics Institute,Nankai University,Tianjin,China;2.Synergetic Innovation Center of Chemical Science and Engineering,Tianjin,China;3.Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan,People’s Republic of China |
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| Abstract: | Magnetic hot spots, which implies confinements and enhancements of magnetic fields, are demonstrated in graphene junctions (GJs) in the mid-infrared range. The appearance of magnetic hot spots in GJs comes from the conduction currents in the junction. In further, the extinction resonance peaks suffer blue shift, along with the increases in the magnetic fields inside junction area, when the junction width reduces. In opposite to the circumstances for electric field enhancements, neither magnetic field enhancements nor resonance frequency of GJs is perturbed by the intrinsic nonlocal electronic response of graphene. Such nonlocality immunized magnetic enhancement could be explained by the polarization dependent property of nonlocal effect. |
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