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en:pwe [2013/01/24 02:46]
deinega [Eigenmodes spatial distribution]
en:pwe [2013/02/14 00:56] (current)
deinega [Waveguide modes. Supercell technique.]
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int rsl=10;   int rsl=10;
for(int i=0;i<=rsl;i++)   for(int i=0;i<=rsl;i++)

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}     }
}   }
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In our 2D case of TM polarization, field corresponds to z-component of electric field E. In our 2D case of TM polarization, field corresponds to z-component of electric field E.
Files with field spatial distribution can be plotted by gnuplot. Files with field spatial distribution can be plotted by gnuplot.
+
+  gnuplot> set pm3d interpolate 2,2
+  gnuplot> set view 0,0
+  gnuplot> cmax=4
+  gnuplot> set palette defined (-cmax 'blue', 0 'white', cmax 'red')
+  gnuplot> set cbrange [-cmax:cmax]
+  gnuplot> sp [5:25] 'f0.4_7.d' u 1:2:4 w pm3d
+
+{{pwe:field_waveguide.png}}
+
+In this example we plot eigenmode corresponding to band 7 at wavevector 0.4. This is waveguide mode (it also can be seen from results for bandstructure). We choose gnuplot parameter 'cmax=4' for better color resolution (for other eigenmodes optimal value of cmax could be different). We plot real part of eigenmode <tex>{\rm Re}({\bf E})</tex>. Electric field in time is a combination of real and imaginary parts: <tex>{\rm Re}({\bf E}\exp{(i\omega t)})</tex>.
====== Bandstructure of 3D photonic crystals ====== ====== Bandstructure of 3D photonic crystals ======