21 February 2013 Numerical analysis and the effective parameter retrieval of helical metamaterials
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Abstract
Research on chiral metamaterials has drawn much attention in recent years. By virtue of chirality, for example, it has been shown that chiral metamaterials can achieve negative refractive index without great energy dissipation. In this report, we applied effective parameter retrieval technique to study the material properties of helical metamaterial. The retrieval procedure yields electromagnetic parameters through employing finite-difference time-domain (FDTD) method under periodic boundary condition. We numerically obtain several electromagnetic parameters of the structure and show that the resonance properties and the index of refraction of the helical metamaterial have strong relationship with its circular dichroism. The optical properties of the structure are also discussed, which provides general design guidelines for engineering functional chiral metamaterials.
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Hsiang-Hung Huang, Hsiang-Hung Huang, Yu-Chueh Hung, Yu-Chueh Hung, } "Numerical analysis and the effective parameter retrieval of helical metamaterials", Proc. SPIE 8632, Photonic and Phononic Properties of Engineered Nanostructures III, 863222 (21 February 2013); doi: 10.1117/12.2003069; https://doi.org/10.1117/12.2003069
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