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app:diffraction_grating
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app:diffraction_grating [2018/01/30 13:05] pklapetek |
app:diffraction_grating [2018/08/29 12:25] (current) pklapetek |
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| where p and q are aperture dimensions, r is distance from aperture to screen center, A is related to incident field amplitude and k=2π/λ where λ is the incident light wavelength. | where p and q are aperture dimensions, r is distance from aperture to screen center, A is related to incident field amplitude and k=2π/λ where λ is the incident light wavelength. | ||
| - | {{ :app:a_grating_gratingmodel.png?300|}} | + | {{ :app:a_grating_gratingmodel.png?200|}} |
| Image on the right shows scheme of the computational volume used for the simulation (a cross-section). We use a parallelepiped bounded by simple absorbing boundary conditions. A plane wave source is established using Total/Scattered field approach (TSF), but only single plane is used to excite the plane wave (all the other faces are skipped). Grating material is introduced as vector material - by using one perfect electric conductor (PEC) parallelepiped to create thin non-transparent plate and one smaller vaccum parallelepiped to create a rectangular hole in it. | Image on the right shows scheme of the computational volume used for the simulation (a cross-section). We use a parallelepiped bounded by simple absorbing boundary conditions. A plane wave source is established using Total/Scattered field approach (TSF), but only single plane is used to excite the plane wave (all the other faces are skipped). Grating material is introduced as vector material - by using one perfect electric conductor (PEC) parallelepiped to create thin non-transparent plate and one smaller vaccum parallelepiped to create a rectangular hole in it. | ||
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| {{ :app:a_grating_results.png?600 |}} | {{ :app:a_grating_results.png?600 |}} | ||
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| + | ---- | ||
| + | // | ||
| + | {{ :app:img_grating.png?120|}} | ||
| + | Sample parameter file: {{app:grating.tar.gz|transmission grating}}. | ||
| + | \\ | ||
| + | A simulation of a transmission grating with large number of far field points evaluated across whole the half space behind the grating. The resulting diffraction pattern is the last channel in the output Gwyddion file. | ||
| + | // | ||
| + | ---- | ||
app/diffraction_grating.1517313915.txt.gz · Last modified: 2018/01/30 13:05 by pklapetek
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