Enhancement of pupil-masked wavelength-scale gas-filled flat acoustic lens based on anomaly apodization effect

Constanza Rubio, Daniel Tarrazó-Serrano, Oleg V. Minin, Antonio Uris, Igor V. Minin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this letter, the improvement in focus by the use of a pupil mask produced in an acoustic mesoscale cuboid particle filled with CO2 is reported. Thereby, the result shows that the pupil mask increases the sound intensity and also increases the resolution (or a reduction of the full width at half maximum, FWHM) in focus compared to the non-masked one. These results are important because they confirm the effect of abnormal amplitude apodization for a one-wavelength dimension acoustic lens and demonstrate that it is possible to improve sound focusing of a cuboid gas-filled lens with one wavelength dimension. This is the smallest size of an acoustic lens ever considered in this type of literature, with side dimensions of the cube equal to one wavelength and a diameter to focus ratio of 2.5, the sound amplification in focus is 5.4 dB at 4125 Hz, with the resolution near to the diffraction limit.

Original languageEnglish
Pages (from-to)396-399
Number of pages4
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume383
Issue number5
DOIs
Publication statusPublished - 21 Jan 2019

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Keywords

  • Apodization
  • Cuboid particle
  • Diffraction
  • Gas-filled lens
  • Sound focusing

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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