EM Explorer - 3D FDTD EM Solver

Growth of Evanescent Fields in Negative Index Material (NIM)

In this example, evanescent fields are produced in air via total internal reflection (TIR) at the interface between the air (n=1) and a high-index material (n=2). The evanescent fields decay in air, but then grow as they propagate through a NIM slab.

NIM_Slab_Evanescent.PNG (28755 bytes)

nim_evan.gif (725064 bytes)

GUI version screen capture of Ey field (note the cooridinates are 90-degree rotated from the one above)

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Download EM Explorer project file (GUI version) (4.0 or later versions required). Note, in this example, the GUI setup is focused on the convenience of visualization, not for computation efficiency.