Check out the visualization below – it can help explain why diffraction orders, or grating lobes, exist only at discrete angles. Waves that are reflected from (or transmitted through) a periodic structure take on the same period as the structure. The field must also be continuous. Only certain discrete angles allow the field to be […]
Dr. Raymond Rumpf recently travelled to Bangkok, Thailand to present a workshop on finite difference frequency domain (FDFD) to students at Bangkok University. Every student left with a working simulation of a diffraction grating.