ldos-opt · Shaker et al. reproduction

3D smoke finished

3D octant Maxwell · z-dipole · 1 μm gap (|x|<0.5 λ0) · Si3N4 slab t=0.3846 λ0 (2 cells / half) · design |x|≤1.35, |y|≤0.38 · dof=6468 · free in-plane · A-a35 fab (R=0.1, λ=3.0, Δη=0.25).

3d-smoke · shifted β=∞ · updated

LDOS / vacuum
3.684
best 3.684 · target ≥ 500
Q
26.16
best 26.16 · target ≥ 50,000
Iteration
2
2 factorizations
Re ω*/ω0
0.9815
wall 6.95 s
Length-scale P
0.1979
λ = 3 · erode/dilate

Done. LDOS/vac=2.77 (best 2.77, seed 2.77). Q=26.162850448950866. Rebuild: LDOS/vac=3.684e+00, Q=2.616e+01, gain vs seed ×1.33.

permittivity
ε(x,y), source as red/white dot. Red band is the frozen vacuum strip when present.
field
|E|² at the evaluation frequency
fragile band
Fragile band ρ_dilate − ρ_erode. Speckle lights up; a clean interface is a thin outline.
history
LDOS enhancement, Q, and length-scale penalty vs Maxwell-matrix factorizations