Highly resonant qBIC metasurfaces open wide momentum bandgaps in photonic time crystals at modulation amplitudes down to 5e-5, orders of magnitude below homogeneous PTCs.
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Photonic time crystals assisted by quasi-bound states in the continuum
Highly resonant qBIC metasurfaces open wide momentum bandgaps in photonic time crystals at modulation amplitudes down to 5e-5, orders of magnitude below homogeneous PTCs.