A finite-element method uses nonsymmorphic space-group irreducible representations to impose symmetry-adapted boundary conditions, reducing photonic band-structure calculations to smaller sub-domains with matched results and lower cost.
For Steps 1 and 2, we can first determine the generators based on the structure
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Nonsymmorphic symmetry adapted finite element modeling of glide-symmetric photonic structures
A finite-element method uses nonsymmorphic space-group irreducible representations to impose symmetry-adapted boundary conditions, reducing photonic band-structure calculations to smaller sub-domains with matched results and lower cost.