TY - JOUR
T1 - Observation of Ultra-High-Q Resonators in the Ultrasound via Bound States in the Continuum
AU - Farhat, Mohamed
AU - Achaoui, Younes
AU - Martínez, Julio Andrés Iglesias
AU - Addouche, Mahmoud
AU - Wu, Ying
AU - Khelif, Abdelkrim
N1 - Publisher Copyright:
© 2024 The Author(s). Advanced Science published by Wiley-VCH GmbH.
PY - 2024/9/4
Y1 - 2024/9/4
N2 - 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.
AB - 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.
KW - Fabry–Perot resonators
KW - bound states in the continuum
KW - high quality factors
KW - metasurfaces
KW - ultrasound
KW - underwater acoustics
UR - http://www.scopus.com/inward/record.url?scp=85197934879&partnerID=8YFLogxK
U2 - 10.1002/advs.202402917
DO - 10.1002/advs.202402917
M3 - Article
AN - SCOPUS:85197934879
SN - 2198-3844
VL - 11
JO - Advanced Science
JF - Advanced Science
IS - 33
M1 - 2402917
ER -