We are performing research on the FDTD simulation for solar cell of various structure.
In the case of electric-field intensity distribution, it is understandable that in a planar (flat rectangular structure without any spectial features) the electric field is distributed inside the structure.
However, in the case of structures such as nanowires, the electric field distribution appear strongly outside the structure with the form of diffraction.
We couldn't find any reason about this in other literature.
We attatched the names of electric field intensity to 'figure (a) planar' and 'figure (b) nanowire' to make it easier reader to understand.
Thank you
Let me know what source you are planning to use and how to set up the grid. Usually a uniform plane wave illuminates small periodic objects, the intensity on the object's surface will be uneven. There can be anything that disturbs the plane wave nature, for example, inhomogeneous materials will cause wavefront distortion.
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