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

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 ful

SUBMITTER: Farhat M 

PROVIDER: S-EPMC11434233 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature