Ultrasonic super-oscillation wave-packets with an acoustic meta-lens

Nature Communications
Ya-Xi ShenXue-Feng Zhu

Abstract

The Schrödinger equation is a fundamental equation to describe the wave function of a quantum-mechanical system. The similar forms between the Schrödinger equation and the paraxial wave equation allow a paradigm shift from the quantum mechanics to classical fields, opening up a plethora of interesting phenomena including the optical super-oscillatory behavior. Here, we propose an ultrasonic meta-lens for generating super-oscillation acoustic wave-packets with different spatial momenta and then superimposing them to a diffraction-limit-broken spot, visually represented by the ring-shaped trapping of tiny particles. Moreover, based on the focused super-oscillation packets, we experimentally verify proof-of-concept super-resolution ultrasound imaging, opening up the arena of super-oscillation ultrasonics for advanced acoustic imaging, biomedical applications, and versatile far-field ultrasound control.

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Citations

Nov 12, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Irving Rondón, Daniel Leykam
Feb 29, 2020·Research : a Science Partner Journal·Kyung Hoon LeeQiming Wang
Feb 25, 2021·Research : a Science Partner Journal·Ye YangHairong Zheng
Jul 10, 2021·The Journal of the Acoustical Society of America·Jaeyub Hyun, H Alicia Kim
Aug 27, 2021·Ultrasonics·Long-Sheng ZengXue-Feng Zhu

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