Back to Maxwell animations home page

Maxwell2D: Diffraction grating, high frequency

Dielectric constant distribution

This example uses exactly the same grating as the first diffraction-grating example, but the frequency has been increased by 50%. It can be seen that the diffraction angle is smaller, and there is a weaker second-order diffraction towards the right.

Electric field animation

Time-averaged Poynting vector

This is an animation of the component of the electric field out of the plane of the page.The direction in which energy is travelling at any instant is proportional to the cross product of the electric and magnetic fields, known as the Poynting vector. The arrows show the direction of the Poynting vector averaged over the simulation, while the colours show its strength.