# Size dependence and convergence of the retrieval parameters of metamaterials

Title | Size dependence and convergence of the retrieval parameters of metamaterials |

Publication Type | Journal Article |

Year of Publication | 2008 |

Authors | Zhou JF, Koschny T, Kafesaki M, Soukoulis CM |

Journal Title | Photonics and Nanostructures-Fundamentals and Applications |

Volume | 6 |

Pages | 96-101 |

Date Published | Apr |

Type of Article | Proceedings Paper |

ISBN Number | 1569-4410 |

Accession Number | ISI:000255667700014 |

Keywords | fishnet structure, left handed material, negative index material, negative-index metamaterial, phase, retrieval parameter, VELOCITY, wavelengths |

Abstract | We study the dependence of the retrieval parameters, such as the electric permittivity, epsilon, the magnetic permeability, mu, and the index of refraction, n, on the size of the unit cell of a periodic metamaterial. The convergence of the retrieved parameters on the number of the unit cells is also examined. We have concentrated our studies on the so-called fishnet structure, which is the most promising design to obtain negative n at optical wavelengths. We find that as the size of the unit cell decreases, the magnitude of the retrieved effective parameters increases. The convergence of the effective parameters of the fishnet as the number of the unit cells increases is demonstrated but found to be slower than for regular split ring resonators and wires structures. This is due to a much stronger coupling between the different unit cells in the fishnet structure. Published by Elsevier B.V. |

DOI | 10.1016/j.photonics.2007.10.003 |

Alternate Journal | Photonics Nanostruct. |