material override

Material region override in Lumerical strategy

When i worked with Lumerical i think i can do new work, when i has a si bar and i want to override as part of a si bar, but i want to discuss effect it and how i can override a part of a special materials.

Whem i want to override material region in lumerical i had problem so we want to share here solving this prolem.I in example switch graphene i saw that 2D rectangular graphene can override on together, you can see it from this link, So i tought can i ovveride other material like silicon, i tested it i had a bar silicon and i ovveride it an other dielectric, result i conculuded that we can not override for 3D can see snapshot of lumerical project in below.

override on silicon

Fig1:Override Material On a Si Bar

You can download Lumerical  FDTD file from this link.So we should use thriple region material for simulation for this case or  multiple region for other cases.

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