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作者机构:Department of Materials Science and Engineering National Tsing Hua University 101 Kuang-Fu Road Hsinchu 30013 Taiwan Institute of NanoEngineering and MicroSystems National Tsing Hua University 101 Kuang Fu Road Hsinchu 30013 Taiwan
出 版 物:《Optics Express》 (Opt. Express)
年 卷 期:2009年第17卷第26期
页 面:24189-24197页
核心收录:
学科分类:0808[工学-电气工程] 070207[理学-光学] 0809[工学-电子科学与技术(可授工学、理学学位)] 07[理学] 08[工学] 0805[工学-材料科学与工程(可授工学、理学学位)] 0803[工学-光学工程] 0702[理学-物理学]
主 题:Anisotropy
摘 要:Recently metamaterials have been demonstrating new physics to enable various unprecedented electromagnetic properties, but pratically they are so sensitive to incident angles of the external excitation that their applications are restricted. Therefore, we present an anisotropic negative refractive index medium operated at multiple-angle incidences (NRIM for MAI) to ease such a burden. Both the simulated and measured transmittance, reflectance and the corresponding material parameters indicate that our structure does possess the anisotropic negative refractive index with respect to different incident angles. In addition, the opposite directions of group and phase velocities are also demonstrated under both grazing-angle, normal and 45-degree incidences to further verify the negative refractive index of the designed monolithic NRIM structure for multiple-angle incidences. ©2009 Optical Society of America.