分割リング共振器を装加した金属スリットアレーによるテラヘルツ波帯での負の屈折率設計

カテゴリ: 論文誌(論文単位)

グループ名: 【E】センサ・マイクロマシン部門

発行日: 2015/11/01

タイトル(英語): Design of a Negative Refractive Index by a Metal Slit Array with Split-Ring Resonators

著者名: 岸　湧大（茨城大学大学院 理工学研究科 電気電子工学専攻），鈴木　健仁（茨城大学大学院 理工学研究科 電気電子工学専攻）

著者名(英語): Yudai Kishi (Major in Electrical and Electronic Engineering, Ibaraki University), Takehito Suzuki (Major in Electrical and Electronic Engineering, Ibaraki University)

キーワード: メタマテリアル，負の屈折率，分割リング共振器，金属スリットアレー　　metamaterial，negative refractive index，split-ring resonator，metal-slit array

要約(英語): Desire for terahertz sophisticated optical devices is rapidly increasing in order to prepare the utilization of higher frequencies, such as terahertz frequencies and optical ranges. However, conventional techniques cannot solve the limitation that devices are designed only by naturally-occurring materials with positive refractive indices. Metamaterials with a negative refractive index can overcome the limitation and provide potential solutions to the demands for novel devices. We design a negative refractive index by a metal-slit array with split-ring resonators in a terahertz frequency. A negative permittivity is designed by a parallel-plate waveguide under a cutoff frequency, and a negative permeability is by the resonance of sprit-ring resonators. An approximate analysis with periodic boundary walls designs an effective negative refractive index with neff = -2.5 + j0.40 at 0.30 THz, and a full model analysis visually confirms performance with n = -2.6 at 0.30 THz. The approximate model can drastically reduce a time-consuming design procedure and simultaneously prepare initial parameters for the full model analysis. The proposed design model with the negative refractive index would lead to potential applications, such as bandpass filters with a high extinction ratio in undesired frequency bands and superlenses overcoming a diffraction limit.

本誌: 電気学会論文誌E（センサ・マイクロマシン部門誌） Vol.135 No.11 （2015） 特集：メタマテリアル・プラズモニクス

本誌掲載ページ: 460-465 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejsmas/135/11/135_460/_article/-char/ja/