Topological Supercavity Resonances in the Finite System

  title={Topological Supercavity Resonances in the Finite System},
  author={Lujun Huang and Bin Jia and Yan Kei Chiang and Sibo Huang and Cheng-yu Shen and Fu Deng and Tianzhi Yang and David A. Powell and Yong Li and Andrey E. Miroshnichenko},
  journal={Advanced Science},
Acoustic resonant cavities play a vital role in modern acoustical systems. The ultrahigh quality‐factor resonances are highly desired for some applications such as high‐resolution acoustic sensors and acoustic lasers. Here, a class of supercavity resonances is theoretically proposed and experimentally demonstrated in a coupled acoustic resonator system, arising from the merged bound states in the continuum (BICs) in geometry space. Their topological origin is demonstrated by explicitly… 

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Interference traps waves in an open system: bound states in the continuum

  • A. Sadreev
  • Physics
    Reports on progress in physics. Physical Society
  • 2021
The method of effective non-Hermitian Hamiltonian equivalent to the coupled mode theory, which detects BICs by finding zero-width resonances is made use of.

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