Fundamental characteristics of localized acoustic modes in photonic crystal fibers

被引:7
作者
Enomori, I [1 ]
Saitoh, K [1 ]
Koshiba, M [1 ]
机构
[1] Hokkaido Univ, Grad Sch Informat Sci & Technol, Sapporo, Hokkaido 0600814, Japan
关键词
photonic crystal fiber; photonic band-gap; acoustic wave; acoustic band-gap; acousto-optic effect;
D O I
10.1093/ietele/e88-c.5.876
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Propagation characteristics of acoustic waves in photonic crystal fibers (PCFs) have been theoretically investigated in details. In order to evaluate acoustic band structures and guided modes for out-of-plane propagation in PCFs, analysis methods based on the finite element method are newly formulated. It is shown through numerical results that complete acoustic band-gaps (ABGs) exist in the cladding region of PCFs and that acoustic guided modes could be localized in the defect region of PCFs by the ABG effect. Furthermore, it is shown that acoustic guided modes could also be localized in the defect region of PCFs by the total internal reflection. These confinement mechanisms of acoustic waves propagating along the fiber length are completely different to those of lightwaves.
引用
收藏
页码:876 / 882
页数:7
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