Rigorous Coupled-Wave Analysis in Lumerical

The optical response of a plane wave impacted on a multilayer structure can be extensively examined using Lumerical’s Rigorous Coupled-Wave Analysis (RCWA) solver.


The Rigorous Coupled-Wave Analysis (RCWA) solver in Lumerical can be utilized with structures like photonic crystals and diffraction gratings that exhibit periodic variations in the layer geometry. The RCWA solver is a perfect instrument for the analysis of these kinds of periodic structures because its simulation times are typically significantly shorter than FDTD’s.

The following outcomes can be computed using the RCWA solver:

  • The percentage (or fraction) of an incident power that is both reflected and transmitted.
  • The strength of the structure’s individual grating orders.
  • The multilayer structure’s magnetic and electric fields.
  • Both S and P polarizations have access to all results.

The RCWA solver can be utilized with release 2022 R1 by using the rcwa script command. The rcwa command documentation contains information on how to utilize the RCWA solver in more depth.




Solver Review | RCWA, FDTD, and STACK

Optical simulations of multilayer structures can be carried out using the RCWA, FDTD, and STACK solvers. The specifics of the geometry and optical source determine which solver is best suited for a certain simulation.

Any simulation that can be performed with RCWA or STACK can generally be done with FDTD. However, unless extremely broad results are desired, RCWA and STACK will typically be faster.

The results from FDTD will typically be less accurate than those from RCWA or STACK since it is a totally numerical method as opposed to RCWA’s semi-analytical nature and STACK’s analytical nature.

Additionally, RCWA and STACK simulations are significantly easier to set up than FDTD simulations, lowering the possibility that the simulation will not be set up correctly.







Ansys Lumerical DGTD (Discontinuous Galerkin Time Domain) In-Action

Supporting Ansys Lumerical DGTD video materials showcasing  functionality, and practical industrial application.

Accuracy and Performance Tips in Ansys Lumerical DGTD
Differences between the Lumerical RCWA and FDTD Solvers