Authored By

Michael Cheng


In this article, two Dynamic Link Library (DLL) files that have been added in OpticStudio 20.1 are introduced. Both are diffractive DLLs to model surface-relief gratings. The two DLLs called “rg_step_RCWA.dll” and “srg_trapezoid_RCWA.dll” model a step grating and a trapezoid grating.

In this article, the methodology used in the DLLs will first be briefly introduced, and then the DLL parameters will be explained. The last part demonstrates two examples.

This article will also explain how to use the Vizualisation tool added in 20.2 to check the grating profiles.

These features are only available in the Premium Subscription edition of OpticStudio. 

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