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Updated: Mar 27, 2026

Three-dimensional Optical-resolution Photoacoustic Microscopy

Three-dimensional Optical-resolution Photoacoustic Microscopy

Published on: May 3, 2011

Acoustic dispersive prism.

Hussein Esfahlani^1,2, Sami Karkar¹, Herve Lissek¹

¹Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Traitement des Signaux LTS2, Lausanne, Switzerland.

Scientific Reports

|January 8, 2016

Summary

Researchers developed the first acoustic dispersive prism, an acoustic device that splits sound waves by frequency. This breakthrough utilizes acoustic metamaterials to direct sound at different angles based on its pitch.

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Area of Science:

Acoustics
Metamaterials Science
Wave Physics

Background:

Optical dispersive prisms separate light by wavelength, a function not yet achieved for sound waves.
Acoustic counterparts are challenging due to material properties and fabrication complexities.
Existing acoustic devices lack the ability to split broadband sound into its frequency components.

Purpose of the Study:

To design and demonstrate the first acoustic dispersive prism.
To achieve frequency-dependent splitting of acoustic waves.
To explore the use of acoustic metamaterials for wave manipulation.

Main Methods:

Utilizing acoustic transmission-line metamaterials with exotic properties.
Exploiting the physical behavior of acoustic leaky-wave radiation.
Designing a structure for operation within the audible frequency range (800 Hz–1300 Hz).

Main Results:

Successfully demonstrated an acoustic dispersive prism.
Achieved splitting of sound waves into frequency-dependent directions.
Confirmed operation within the 800 Hz–1300 Hz audible range.
Leveraged frequency-dependent refractive index for wave steering.

Conclusions:

The first acoustic dispersive prism has been realized.
Acoustic metamaterials enable frequency-dependent sound manipulation.
Leaky-wave radiation facilitates sound propagation into the surrounding medium.