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 $s$ and $p$ 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 $193\mathrm{nm}$ .

Near field intensity for $s$ -polarized illumination¶

Near field intensity for $p$ -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:

_images/transmission_reflectivity_versus_illumination2.png

In the script data_analysis/run_scan_width.m the width of the line varies from $150 \mathrm{nm}$ to $250 \mathrm{nm}$ with fixed illumination angle. This yields the following line width dependencies:

_images/transmission_reflectivity_versus_line_width.png