Acoustic beam splitting in a sonic crystal around a directional band gap

doi:10.1088/1674-1056/22/11/114301

中国物理B ›› 2013, Vol. 22 ›› Issue (11): 114301-114301.doi: 10.1088/1674-1056/22/11/114301

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Acoustic beam splitting in a sonic crystal around a directional band gap

Ahmet Cicek^a, Olgun Adem Kaya^b, Bulent Ulug^c

a Department of Physics, Faculty of Arts and Sciences, Mehmet Akif Ersoy University, Campus 15100, Burdur/Turkey;
b Department of Computer Education and Educational Technology, Faculty of Education, Inonu University 44280, Malatya/Turkey;
c Department of Physics, Faculty of Science, Akdeniz University, Campus 07058, Antalya/Turkey

收稿日期:2013-03-12 修回日期:2013-04-01 出版日期:2013-09-28 发布日期:2013-09-28
基金资助:
Project supported by Akdeniz University Scientific Research Projects Coordination Unit.

Acoustic beam splitting in a sonic crystal around a directional band gap

Ahmet Cicek^a, Olgun Adem Kaya^b, Bulent Ulug^c

a Department of Physics, Faculty of Arts and Sciences, Mehmet Akif Ersoy University, Campus 15100, Burdur/Turkey;
b Department of Computer Education and Educational Technology, Faculty of Education, Inonu University 44280, Malatya/Turkey;
c Department of Physics, Faculty of Science, Akdeniz University, Campus 07058, Antalya/Turkey

Received:2013-03-12 Revised:2013-04-01 Online:2013-09-28 Published:2013-09-28
Contact: Ahmet Cicek E-mail:ahmetcicek@mehmetakif.edu.tr
Supported by:
Project supported by Akdeniz University Scientific Research Projects Coordination Unit.

摘要/Abstract

摘要： Beam splitting upon refraction in a triangular sonic crystal composed of aluminum cylinders in air is experimentally and numerically demonstrated to occur due to finite source size, which facilitates circumvention of a directional band gap. Experiments reveal that two distinct beams emerge at crystal output, in agreement with the numerical results obtained through the finite-element method. Beam splitting occurs at sufficiently-small source sizes comparable to lattice periodicity determined by the spatial gap width in reciprocal space. Split beams propagate in equal amplitude, whereas beam splitting is destructed for oblique incidence above a critical incidence angle.

关键词: sonic crystal, directional band gap, source size, beam splitting

Abstract: Beam splitting upon refraction in a triangular sonic crystal composed of aluminum cylinders in air is experimentally and numerically demonstrated to occur due to finite source size, which facilitates circumvention of a directional band gap. Experiments reveal that two distinct beams emerge at crystal output, in agreement with the numerical results obtained through the finite-element method. Beam splitting occurs at sufficiently-small source sizes comparable to lattice periodicity determined by the spatial gap width in reciprocal space. Split beams propagate in equal amplitude, whereas beam splitting is destructed for oblique incidence above a critical incidence angle.

Key words: sonic crystal, directional band gap, source size, beam splitting

中图分类号: (Reflection, refraction, diffraction of acoustic waves)

43.20.El

43.40.Fz (Acoustic scattering by elastic structures) 43.58.Fm (Sound level meters, level recorders, sound pressure, particle velocity, And sound intensity measurements, meters, and controllers)

Ahmet Cicek, Olgun Adem Kaya, Bulent Ulug. Acoustic beam splitting in a sonic crystal around a directional band gap[J]. 中国物理B, 2013, 22(11): 114301-114301.

Ahmet Cicek, Olgun Adem Kaya, Bulent Ulug. Acoustic beam splitting in a sonic crystal around a directional band gap[J]. Chin. Phys. B, 2013, 22(11): 114301-114301.

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Acoustic beam splitting in a sonic crystal around a directional band gap

Acoustic beam splitting in a sonic crystal around a directional band gap

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