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Observation of Ultra‐High‐Q Resonators in the Ultrasound via Bound States in the Continuum.

Authors :
Farhat, Mohamed
Achaoui, Younes
Martínez, Julio Andrés Iglesias
Addouche, Mahmoud
Wu, Ying
Khelif, Abdelkrim
Source :
Advanced Science. 9/4/2024, Vol. 11 Issue 33, p1-10. 10p.
Publication Year :
2024

Abstract

The confinement of waves in open systems represents a fundamental phenomenon extensively explored across various branches of wave physics. Recently, significant attention is directed toward bound states in the continuum (BIC), a class of modes that are trapped but do not decay in an otherwise unbounded continuum. Here, the theoretical investigation and experimental demonstration of the existence of quasi‐bound states in the continuum (QBIC) for ultrasonic waves are achieved by leveraging an elastic Fabry–Pérot metasurface resonator. Several intriguing properties of the ultrasound quasi‐bound states in the continuum that are robust to parameter scanning are unveiled, and experimental evidence of a remarkable Q‐factor of 350 at ≈1 MHz frequency, far exceeding the state‐of‐the‐art using a fully acoustic underwater system is presented. The findings contribute novel insights into the understanding of BIC for acoustic waves, offering a new paradigm for the design of efficient, ultra‐high Q‐factor ultrasound devices. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
21983844
Volume :
11
Issue :
33
Database :
Academic Search Index
Journal :
Advanced Science
Publication Type :
Academic Journal
Accession number :
179962342
Full Text :
https://doi.org/10.1002/advs.202402917