22 February 2012 Numerical study of helix photonic metamaterial
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Abstract
Helix photonic metamaterials are attractive to many applications due to the unique properties of strong circular dichroism and gyrotropy. In this study, the optical properties of metallic helix metamaterial were systematically investigated. Such metamaterial is composed of three-dimensional metallic helical nanowires arranged in a two-dimensional array. 3D finite-difference time-domain (FDTD) method was adopted for simulating the spectral response under the excitation of circularly polarized light. We show that the spectral responses were correlated to the dimensions of the helix structures. Generally, the resonance wavelengths as well as optical properties were determined by the geometrical parameters and the composed materials of the structures. When the dimension scaled down, electromagnetic interactions between helices are pronounced, which consequently affect the optical responses of the structures. The dependency between structure dimension and the corresponding optical properties were discussed and presented in this report.
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Yu-Ray Li, Yu-Ray Li, Hsiang-Hung Huang, Hsiang-Hung Huang, Yi-Chun Ling, Yi-Chun Ling, Yu-Chueh Hung, Yu-Chueh Hung, } "Numerical study of helix photonic metamaterial", Proc. SPIE 8269, Photonic and Phononic Properties of Engineered Nanostructures II, 82692N (22 February 2012); doi: 10.1117/12.909794; https://doi.org/10.1117/12.909794
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