Focusing the electromagnetic wave with a magnetic field |
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| Authors: | Chen Shaowen Du Junjie Liu Shiyang Lin Zhifang Chui S T |
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| Institution: | Surface Physics Laboratory, Fudan University, Shanghai, China. |
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| Abstract: | We examine manipulating the electromagnetic (EM) wave with an external static magnetic field (ESMF) taking advantage of the versatility of the magnetic photonic crystal (PC). The effect of a nonuniform ESMF on the permeability of the constituent magnetic material in the PC is demonstrated to create a gradient of the effective optical index in the crystal, leading to the focusing of the EM wave, with a magnetically tunable focal length, focused waist radius, and the intensity at the focus. |
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