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Collimation of Acoustic Radiation via Zero–Refraction–Index 2D Periodic Structures

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Abstract

The experimental study results of acoustic radiation generation via zero–refraction–index periodic structures are presented. The frequency dependences of refraction indices for structures in an acoustic frequency range are constructed based on the previous data in a microwave range. The measurements showed that, in a frequency range, where the refraction index changes sign, acoustic radiation is focused and has a narrow directivity pattern. Attention is drawn towards research trends that indicate where these structures may be useful.

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Funding

This study was performed within the framework of State contract “Optical and Acoustic Methods for Studying Multiphase Condensed Media and Impacts on their Structure” (state registration no. AAAA-A18-118021390190-1).

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Authors and Affiliations

  1. Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991, Moscow, Russia

    V. I. Golovanov & K. F. Shipilov

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  1. V. I. Golovanov
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  2. K. F. Shipilov
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Correspondence to K. F. Shipilov.

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Translated by N. Podymova

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Golovanov, V.I., Shipilov, K.F. Collimation of Acoustic Radiation via Zero–Refraction–Index 2D Periodic Structures. Acoust. Phys. 66, 257–261 (2020). https://doi.org/10.1134/S1063771020010054

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  • DOI: https://doi.org/10.1134/S1063771020010054

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