TRANSMISSION METALENS FOR ULTRASOUND FOCUSING IN WATER

Mariia Krasikova, Andrey Lutovinov, Yan Kei Chiang, David A. Powell, Steffen Marburg, Polina Kapitanova

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Planar lenses for ultrasound focusing in water environments have a wide potential for a variety of application, including medical ultrasound, imaging techniques and ultrasonic communications. In this work we develop a transmission metalens allowing focusing of ultrasound in water. The metalens consists of several finite-size gratings allowing diffraction primarily into one particular transmission channel. Using numerical calculations and optimisation techniques we develop a design of the gratings with maximized transmission into -1 channel. Then we combine them in such a way that the diffracted waves converge at a focal point, which is also demonstrated via numerical calculations. It was shown that the developed design allows to achieve focusing for metallic as well as polylactic acid (PLA) made metalens. Since the design is based on physical principles parameters of the metalens can be adjusted to the desired frequency and focal distance.

Original languageEnglish
Title of host publicationProceedings of the 29th International Congress on Sound and Vibration, ICSV 2023
EditorsEleonora Carletti
PublisherSociety of Acoustics
ISBN (Electronic)9788011034238
StatePublished - 2023
Event29th International Congress on Sound and Vibration, ICSV 2023 - Prague, Czech Republic
Duration: 9 Jul 202313 Jul 2023

Publication series

NameProceedings of the International Congress on Sound and Vibration
ISSN (Electronic)2329-3675

Conference

Conference29th International Congress on Sound and Vibration, ICSV 2023
Country/TerritoryCzech Republic
CityPrague
Period9/07/2313/07/23

Keywords

  • acoustic metalens
  • diffraction gratings
  • underwater focusing

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