MC GratingRestrictions
This documentation was written for releases up to 2018 and is being revised. Some dialogs have changed since. If something does not match what you see, write to mc@mcgrating.com.
C method domain of applicability is mainly defined by the ratio of grating depth to its period.
Chandezon method gives reliable results when the full grating depth less than two grating periods in case of the TE polarization and less than one period in case of the TM polarization. If the grating depth is close to the critical value there are an optimal number of field decomposition orders providing the best result. In practice it was found that the optimal number of decomposition orders for calculating deep gratings does not exceed 30. Most likely this restriction is similar to the Rayleigh method convergence problem1, and finally because of insufficient calculation accuracy of high order harmonics.
Calculation of grating structures with long period needs large number of decomposition orders and has the restriction mentioned above.
The balance (sum of all diffraction orders power) is a good criterion of results reliability. In case of lossless structures this value should be close to unity and less than unity for dissipative structures.
From the in-application help of Chandezon Collinear and Chandezon Conical, documented through 2018. If you publish results computed with MC Grating, see how to cite it.