Super-resolution acoustic imaging with acousto-optical metasurfaces

Bogdan Popa

doi:10.1117/12.3014668

10 May 2024 Super-resolution acoustic imaging with acousto-optical metasurfaces

Bogdan Popa

Proceedings Volume 12946, Active and Passive Smart Structures and Integrated Systems XVIII; 1294604 (2024) https://doi.org/10.1117/12.3014668
Event: SPIE Smart Structures + Nondestructive Evaluation, 2024, Long Beach, California, United States

Abstract

The main drawbacks of conventional acoustic imaging systems are low resolution images and high power consumption. This presentation will outline a new imaging paradigm that addresses these limitations. In this approach the environment is probed with an omnidirectional acoustic source and the back-scattered sound captured on an acoustic aperture is converted into a coherent optical field. The latter is focused into an image with off-the-shelf commercial cameras. The acoustic-to-light conversion is performed by a metasurface consisting of independent unit cells requiring no electronic synchronization thus facilitating scalability of the metasurface to large numbers of unit cells. The main advantages of this method are low power requirements and the ability to provide much higher resolution images than possible with conventional methods especially when low frequency sound is used to probe the environment.

Conference Presentation

Citation Download Citation

Bogdan Popa "Super-resolution acoustic imaging with acousto-optical metasurfaces", Proc. SPIE 12946, Active and Passive Smart Structures and Integrated Systems XVIII, 1294604 (10 May 2024); https://doi.org/10.1117/12.3014668

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