![]() ![]() Also extremely fast, but can only simulate stacks of periodic structures. Want to simulate reflection off photonic crystals, or find what happens when you shine light on a diffraction grating? Rigorous Coupled Wave Analysis can do that for you. This is blazingly fast, but it's limited to this specific problem. Want to know the reflection coefficient from a planar stack of materials? You should probably use the Transfer Matrix Method (also known as the Scattering Matirx Method). There are lots of specialized, very fast, very accurate methods which can be used to solve specific problems. How do you know which way to solve your problem? Usually, there is a trade-off between speed and flexibility. For a given problem, there are usually many different ways to solve it. So too with computational electromagnetics. There is a saying I'm not so fond of as a cat lover - there are many ways to skin a cat. In this course we will be working with MEEP, a Finite Difference Time Domain electromagnetics simulator. It's these kinds of questions that computational electromagnetics allows us to answer. ![]() ? What if this structure is finite instead of infinite?". What if this was sitting next to this other object. While you can get far (really really far) with theoretical electromagnetics alone, often you have a simple analytic model that works great, but you want to model some added complexity that would be difficult to do analytically "So how do things change when I add this little bump right here. ![]()
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