Mechanical bound states in the continuum for macroscopic optomechanics.

  title={Mechanical bound states in the continuum for macroscopic optomechanics.},
  author={Mengdi Zhao and Kejie Fang},
  journal={Optics express},
  volume={27 7},
Bound states in the continuum (BICs), an emerging type of long-lived resonances different from the cavity-based ones, have been explored in several classical systems, including photonic crystals and surface acoustic waves. Here, we reveal symmetry-protected mechanical BICs in the structure of slab-on-substrate optomechanical crystals. Using a group theory approach, we identified all the mechanical BICs at the Γ point in optomechanical crystals with C4v and C6v symmetries as examples, and… 

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