Square Unit Cell¶
This is a simple example of a 2D grating with a twofold periodic square lattice. The 3D unit cell is periodic in and direction. It contains a rhomboid (parallelepiped) situated on a substrate and surrounded by a background material. The materials in the example are chosen as chrome (rhomboid), glass (substrate) and air (background).
The grating is illuminated by plane waves with and polarization.
JCMsuite computes the near field distributions.
The following figures show the near-field intensities within the structure for
perpendicular plane wave incidence from the substrate side at a wavelength of .
The post process
FourierTransform computes the amplitudes of the transmitted diffraction orders.
The Matlab® script
data_analysis/run_scan_illumination.m provides a scan over the incidence angle.
It produces the following plots showing the intensities for reflected and transmitted diffraction orders:
In the script
data_analysis/run_scan_width.m the width of the pattern varies from to with fixed illumination angle.
This yields the following dependencies: