1706 2次元フォノニック結晶の音波伝搬シミュレーション : 負の屈折とレンズ効果(OS17.フォトニック・フォノニック構造の設計とシミュレーション(2),オーガナイズドセッション)

DOI Web Site

書誌事項

タイトル別名
  • 1706 Numerical Simulation of Acoustic Wave in a Two-Dimensional Phononic Crystal : Negative Refraction and Lens Effect

抄録

Lens effect of acoustic waves in a two-dimensional (2D) phononic crystal is studied by numerical simulation based on the finite-difference time-domain (FDTD) method. We calculate the phonon band structure of 2D phononic crystals, consisting of metal cylinders placed periodically in water. Lens effect is observed by the negative refraction of acoustic waves, which results in acoustic waves refocused at the point outside the crystal. To increase the focal intensity, we introduce a 2D phononic crystal shield with a different composition of material, which reflects incident acoustic waves from the source. We show how the focal intensity is improved by using the 2D phononic crystal shield.

収録刊行物

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ