Enhancement of sound in chirped sonic crystals

被引：70

作者：

Romero-Garcia, V. ^{[1
]}

Pico, R. ^{[1
]}

Cebrecos, A. ^{[1
]}

Sanchez-Morcillo, V. J. ^{[1
]}

Staliunas, K. ^{[2
]}

机构：

[1] Univ Politecn Valencia, Inst Invest Gest Integrada Zonas Costeras, Valencia 46730, Spain

[2] Univ Politecn Cataluna, Dept Fis & Engn Nucl, ICREA, E-08222 Barcelona, Spain

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 09期

关键词：

ACOUSTIC-WAVES; BAND;

D O I：

10.1063/1.4793575

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We propose and experimentally demonstrate a mechanism of sound wave concentration based on soft reflections in chirped sonic crystals. The reported controlled field enhancement occurs at around particular (bright) planes in the crystal and is related to a progressive slowing down of the sound wave as it propagates along the material. At these bright planes, a substantial concentration of the energy (with a local increase up to 20 times) was obtained for a linear chirp and for frequencies around the first band gap. A simple couple mode theory is proposed that interprets and estimates the observed effects. Wave concentration energy can be applied to increase the efficiency of detectors and absorbers. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793575]

引用

页数：4

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