| http://www.w3.org/ns/prov#value | - As described above, according to the optical multilayer structure and the optical switching device of the invention, where the complex refractive index of the first layer or the substrate instead of the first layer is N1 (=n1???i???k1, n1 is a refractive index, k1 is an extinction coefficient, and i is an imaginary unit), the refractive index of the second layer or the transparent layer is n2, and
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