Enhancing transmission efficiency of bending waveguide basedon graded sonic crystals using antireflection structures

Liang Yu Wu, Lien-Wen Chen

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The conventional antireflection coating (ARC) structure for sonic crystal devices is to place the cylinders at the interface between a sonic crystal device and a background medium. The radius of ARC cylinders and the distance between the ARC and the sonic crystal device are adjusted to obtain an optimal antireflection effect. We propose that ARC structures are directly designed by using the conventional ARC theory instead of scanning the geometric and spatial parameters of the conventional ARC structures. According to the concept of the effective refractive index of sonic crystals, the exact ARC structures can be implemented by sonic crystals. The transmission efficiency of a bending waveguide designed by graded sonic crystals can be enhanced by introducing the ARC structures based on sonic crystals. The performances of different ARC structure designs are compared and discussed.

Original languageEnglish
Pages (from-to)743-748
Number of pages6
JournalApplied Physics A: Materials Science and Processing
Volume107
Issue number3
DOIs
Publication statusPublished - 2012 Jun 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

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