Perfect electrical conductor (PEC): All radiation is reflected Perfect magnetic conductor (PMC): Less common Periodic boundary condition: Used for periodic structures. place PML far from any scatterer or use circular computation domain if possible Magnitude of reflections is wavelength dependent Additional computational complexity: PML needs to be meshed and the fields need to be solved in this region This can be minimized by ensuring that radiation hits PML at a 90 degree angle i.e. Disadvantages: Some reflections from PML can occur. This is perhaps the most common way to truncate a computational domain. Will absorb radiation without reflection. (Faraday’s law) … Source: WikipediaĬomputational domain Radiation Object Source Truncation boundaryĥ Boundary conditions Perfectly matched layer (PML) Computational domain Setting up Lumerical FDTD simulation workspace and analyzing simulation dataįDTD evaluates Maxwell’s equations on a grid, eg. The size of the pit will be optimized to maximize the scattered light intensity with respect to a focused 650nm laser beam. The size of the pit will."- Presentation transcript:ġ Agenda for today Today we will use Lumerical FDTD to simulate the scattering of light from a ‘pit’ used to encode data on a DVD. Presentation on theme: "Agenda for today Today we will use Lumerical FDTD to simulate the scattering of light from a ‘pit’ used to encode data on a DVD.
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