Realization of all-band-flat photonic lattices
arXiv:2305.05906 · doi:10.1038/s41467-024-45580-w
Abstract
Flatbands play an important role in correlated quantum matter and have novel applications in photonic lattices. Synthetic magnetic fields and destructive interference in lattices are traditionally used to obtain flatbands. However, such methods can only obtain a few flatbands with most bands remaining dispersive. Here we realize all-band-flat photonic lattices of an arbitrary size by precisely controlling the coupling strengths between lattice sites to mimic those in Fock-state lattices. This allows us to go beyond the perturbative regime of strain engineering and group all eigenmodes in flatbands, which simultaneously achieves high band flatness and large usable bandwidth. We map out the distribution of each flatband in the lattices and selectively excite the eigenmodes with different chiralities. Our method paves a new way in controlling band structure and topology of photonic lattices.
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- Flux-mediated effective Su-Schrieffer-Heeger model in an impurity decorated diamond chain
- Non-Hermitian reshaping of high-order Landau modes
- On flat bands in the -- XXZ sawtooth chain
- Compact localized currents in flat bands with broken time-reversal symmetry
- Electric-field driven flat bands in the distorted sawtooth chain via the Katsura-Nagaosa-Balatsky mechanism