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Eigen frequecny analysis,band gap analysis
Posted Jul 31, 2017, 4:58 p.m. EDT 0 Replies
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Hallo,
I am trying to find band diagram of a photonic crystal.My unit cell has periodic boundary condtion in x an dy direction .But z direction is open and also kz=0( no propagation).wave is only propagating in x and y direction.
PML and sacttering boundary condition has been used in top and bottom(open boundary).But the problem is the wave is reflecting back to the computational doamin.I have tried to increase the thickness and abosorption coefficient(scaling factor).But no improvement has been found.
I have also varied the distance of PML layer from the substrate and the thickness of the substrate from lambda to 10*lambda(to check when the eigen frequency become independent those variation).But no feasible conclusion could be made.
Could you please check the model or suggest me on boundary condiiton.
Could you please help me regarding this.
Best regards
Ansiuzzaman Boni
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Hello Anisuzzaman Boni
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