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Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
docs:become [2020/03/29 12:14] pklapetek |
docs:become [2020/04/02 11:21] pklapetek [2D calculation] |
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in all the other calculations. | in all the other calculations. | ||
- | The image below shows the normalized angular dependence of the diffraction from the grating. | + | The image below shows the normalized angular dependence of the diffraction from the (finite size) grating. |
{{:docs:become_grating_2d_normalised.png?600|}} | {{:docs:become_grating_2d_normalised.png?600|}} | ||
- | It can be seen that there is a slight asymmetry in the result which needs to be analyzed, probably due to wrong placement of far-field points. The average intensity of the s+1 and s-1 diffraction orders is 0.183 of the incident intensity. | + | When inspected in detail, it can be seen that there is a slight asymmetry in the result which needs to be analyzed, probably due to wrong placement of far-field points. The average intensity of the s+1 and s-1 diffraction orders is 0.178 of the incident intensity for the default silver model (not the Become one). |
+ | |||
+ | List of different settings and results: | ||
+ | |||
+ | * metal setting: 6 1.03583 0 1.37537e+16 1.25733e+14 2.1735 -0.504659 7.60514e+15 4.28131e+15 0.554478 -1.48944 6.13809e+15 6.62262e+14 leads to: 0.172 * | ||
===== 3D calculation ===== | ===== 3D calculation ===== | ||
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The aspects that need further investigation or tuning: | The aspects that need further investigation or tuning: | ||
- | * polarisation correctness (TE mode is p-polarisation) | ||
* far-field calculation postprocessing speedup, now very slow, printing many debugging data. | * far-field calculation postprocessing speedup, now very slow, printing many debugging data. | ||
- | * cross-check metal refractive index (now relying on pre-fitted database data) | + | * cross-check metal refractive index (now relying on pre-fitted database data, which is wrong) |
- | * correct placement of far field points (get rid of the slight asymmetry observed) | + | * there is still slight asymmetry |
* evaluate the voxel size vs. speed vs. accuracy for the benchmark. | * evaluate the voxel size vs. speed vs. accuracy for the benchmark. | ||