I’m beginning to use the 32-Bit version of OptiFDTD, and I’m trying to run a few basic simulations. However, I’ve had a pretty significant difficulty and perhaps someone can lend a hand. I ran a simple simulation with a plane wave moving through an air medium coming into contact with a dielectric block (glass). The known reflectivity of glass is about 4%. However, when I run the simulation (using the boundary conditions from the plane wave tutorial), the backscattered electric field has an amplitude of about .22. The forward scattered electric field is 1.18. The ration of the intensities here yields a result of about a 3% reflectivity. I wondered if anyone else has had a similar problem, and if there are any solutions?
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