F. A. Q.
Q: I got warning message "Warning: Matrix is close to singular or badly scaled. Results may be inaccurate." What should I do?
A: You can get this message because of different reasons (e. g. average index of refraction is close to zero). Try to set a slightly different filling factor, angle of incidence, number of modes, etc.
Q: Results fail to converge for higher Fourier modes.
A: This usually happens for materials with negative permittivity/permeability. This is not a bug, but the nature of this method. Adding a tiny imaginary part to permittivity/permeability may help.
Q: I am not sure how to use RawDog.
A: Try to get help from the manual (click on the question mark on each panel) or hover the pointer over the user interface, so a helping tooltip appears.
A: You can get this message because of different reasons (e. g. average index of refraction is close to zero). Try to set a slightly different filling factor, angle of incidence, number of modes, etc.
Q: Results fail to converge for higher Fourier modes.
A: This usually happens for materials with negative permittivity/permeability. This is not a bug, but the nature of this method. Adding a tiny imaginary part to permittivity/permeability may help.
Q: I am not sure how to use RawDog.
A: Try to get help from the manual (click on the question mark on each panel) or hover the pointer over the user interface, so a helping tooltip appears.