Acoustic vortex beam generation using a compact metamaterial aperture

Charles A. Rohde; Christina J. Naify; Matthew D. Guild; Theodore P. Martin; Jeffrey S. Rogers; David C. Calvo; Gregory J. Orris

doi:10.1117/12.2260164

5 April 2017 Acoustic vortex beam generation using a compact metamaterial aperture

Charles A. Rohde, Christina J. Naify, Matthew D. Guild, Theodore P. Martin, Jeffrey S. Rogers, David C. Calvo, Gregory J. Orris

Author Affiliations +

Proceedings Volume 10170, Health Monitoring of Structural and Biological Systems 2017; 101701I (2017) https://doi.org/10.1117/12.2260164
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2017, Portland, Oregon, United States

Abstract

We have previously demonstrated an acoustic vortex wave antenna (VWA) based on a metamaterial aperture. This system produced arbitrary angular mode number waveforms,¹ but did not produce pure integer mode vortex waves. In this work we extend our previous result to a design which radiates pure integer vortex modes. By combining an acoustic leaky wave antenna with a ring resonator waveguide we produce integer mode acoustic vortex waves. Further, we computationally show that this spatial mode can be transferred between two opposing acoustic vortex wave antenna in a "pitch - catch" configuration.

Citation Download Citation

Charles A. Rohde, Christina J. Naify, Matthew D. Guild, Theodore P. Martin, Jeffrey S. Rogers, David C. Calvo, and Gregory J. Orris "Acoustic vortex beam generation using a compact metamaterial aperture", Proc. SPIE 10170, Health Monitoring of Structural and Biological Systems 2017, 101701I (5 April 2017); https://doi.org/10.1117/12.2260164

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