Line Grating¶
This is a simple example for a 1D periodic line grating. The periodic unit cell contains the 2D cross-section through the grating. In this case the cross-section of the line has a trapezoidal shape, it is situated on a substrate and surrounded by a background material. The materials in the example are chosen as chrome (line), 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 .

Near field intensity for -polarized illumination¶

Near field intensity for -polarized illumination¶
The post process FourierTransform
computes the amplitudes of the transmitted diffraction orders.
Parameter scan
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 line varies from to
with fixed illumination angle.
This yields the following line width dependencies: