Select 2D (faster, useful for effective index approximations) or 3D (highly accurate, computationally demanding). Set Free-Space Wavelength (
Simple to set up but can be computationally wasteful if large areas of uniform cladding require the same fine spacing as a narrow waveguide core.
The Launch Window tells the simulation engine how light enters the structure: rsoft cad manual
Due to its 2D nature, graphene is tricky to model. The manual provides specific functions ( graphene_real and graphene_imag ) that calculate the refractive index based on chemical potential, temperature, and scattering rates. You can use isotropic graphene or anisotropic versions (GrapheneCX, CY, CZ) depending on the polarization orientation of your light source.
): For accurate results, your spatial grid step should ideally be smaller than inside the material. Step 2: Establishing Materials in the Material Registry Before drawing components, define what they are made of. Assign a fixed value (e.g., for Silicon, for Silica). The manual provides specific functions ( graphene_real and
Uses Rigorous Coupled-Wave Analysis (RCWA) for periodic structures and gratings.
This is where the RSoft CAD demonstrates its power for creating complex and flexible designs. The manual details: Step 2: Establishing Materials in the Material Registry
. Ensure grid sizes satisfy the Courant condition for FDTD ( 3. Geometric Object Creation and Properties
Used to reduce simulation time by modeling only half or a quarter of a symmetric device. 5. Launching Simulators