Holographic mirrors for spatial ultrasound modulation in contactless acoustic energy transfer systems

Ahmed Sallam, Vamsi C. Meesala, Muhammad R. Hajj, Shima Shahab

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

This work introduces and investigates a flat acoustic mirror capable of efficiently manipulating a wavefront and creating an arbitrary pressure pattern in a target plane using the sound reflection phenomenon. The mirror is a metallic holographic lens that performs as a spatial ultrasound modulator by introducing a relative phase shift to the reflected wavefront. The phase-shifting lens is designed using an iterative angular spectrum algorithm and 3D-printed from powdered aluminum through direct metal laser melting. The lens's capabilities to construct diffraction-limited complex pressure patterns under water are tested numerically and experimentally. The proposed holographic mirror design can drive immense improvements in applications involving contactless acoustic energy transfer, which is investigated in this Letter.

Original languageEnglish
Article number144101
JournalApplied Physics Letters
Volume119
Issue number14
DOIs
StatePublished - 4 Oct 2021

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