Figure 2 | Coupled bilayer flat optics from guided resonances to high-Q states (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 2 | Coupled bilayer flat optics from guided resonances to high-Q states

Caption

Figure 2 | Coupled bilayer flat optics from guided resonances to high-Q states. a, A single photonic crystal slab supports guided resonances when folded modes couple to free-space radiation. b, Symmetry constraints can suppress radiation and generate bound states in the continuum. c, In aligned bilayers, coupled modes can form symmetry-protected or Fabry-Perot-type bound states in the continuum. d-f, Interlayer spacing tunes mode splitting, radiative interference, band dispersion, and resonance linewidth without changing the in-plane geometry.

Credit

Haoning Tang et al.

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