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Metamaterials for therapeutic ultrasound applications

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MWSW04 - Multiple scattering in engineering and applied sciences

Passive acoustic structures can be used to engineer wavefronts in many practical applications. By tuning its topology, the local refraction, scattering or inner resonances can be tailored for a particular functionality. We report the use of metasurfaces to synthesize wavefronts by tuning subwavelength 3D-printed elastic resonators for ultrasonic frequencies. These structures are shown to be remarkably flexible for spatially-coding arbitrary phase-conjugated fields corresponding to the ones used for selected biomedical ultrasound applications. In this way, by tuning the hologram inner structure, we can synthesize high-intensity acoustic images with unprecedent resolution, which are currently being applied to focus therapeutic ultrasound beams and treat several diseases in a non-invasive, non-ionizing, localized and low-cost manner.

This talk is part of the Isaac Newton Institute Seminar Series series.

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