Material builder!

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SiO2_gl: 20 nm
Al2O3_ord: 40 nm

Ni

double-click the layer to select it, drag it to re-order
use sliders

basic materials:

Search

constant response:
ε_real: ε_imag:

Lorentz models: eps.infinity

cent.: width: ampl.:

another/remove

keep current
Thickness nm or substrate

Add Undo Delete Repeat × Unpack
Effective media models
Mix

Save Add curve Plot

structure:

zoom

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x_min: x_max:
y_min: y_max:

example here