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Title: Broadband enhanced transmission of acoustic waves through serrated metal gratings

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4905340· OSTI ID:1392481
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [3];  [2]
  1. Nanjing Univ. (China); Jiangnan Univ., Wuxi (China)
  2. Nanjing Univ. (China)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
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In this letter, we have demonstrated that serrated metal gratings, which introduce gradient coatings, can give rise to broadband transmission enhancement of acoustic waves. Here, we have experimentally and theoretically studied the acoustic transmission properties of metal gratings with or without serrated boundaries. The average transmission is obviously enhanced for serrated metal gratings within a wide frequency range, while the Fabry-Perot resonance is significantly suppressed. An effective medium hypothesis with varying acoustic impedance is proposed to analyze the mechanism, which was verified through comparison with finite-element simulation. We report the serrated boundary supplies gradient mass distribution and gradient normal acoustic impedance, which could efficiently reduce the boundary reflection. Further, by increasing the region of the serrated boundary, we present a broadband high-transmission grating for wide range of incident angle. Our results may have potential applications to broadband acoustic imaging, acoustic sensing, and acoustic devices.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
Ministry of Science and Technology of the People's Republic of China; National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357; 2012CB921502; 2010CB630705; 11034005; 61475070; 11474157; 11321063
OSTI ID:
1392481
Alternate ID(s):
OSTI ID: 1226688
Journal Information:
Applied Physics Letters, Vol. 106, Issue 1; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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Cited By (2)

Constructing Metastructures with Broadband Electromagnetic Functionality journal November 2019
Partially disordered TiO 2 nanotube photonic crystal: randomness characterization and tuning of reflected scattering light journal October 2019

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