Research Topic

Wave Propagation in Liquid Crystal

This topic focuses on the simulation of Inverted microstrip (IMSL) which is can be used for tunable phaseshifters. In this device, Liquid crystal is filled between microstip line and groud. It is shown in the figure below.

The simulation of this device consists of two steps. Firstly, achieve the LC configurations in the equilibrium state when an electric field is applied. Secondly, simulate how the modulate Gaussian signal propagate in the given LC configurations.
Now most work of first step has been accomplished. As shown in the figure below, it is a simplified model that LC is filled between two PEC boards. Then the PEC above is applied with an voltage higher than the PEC below. In the figure, n is the director of LC and S is orientation order parameter. It can be seen that the molecules of LC is oriented by the electric field and there are two defects in the highlight areas.

Key Research Area

Multi-Physics; Liquid crystal modeling; Q tensor method; Numerical optimization


Prof. Dr.-Ing. Thomas Weiland (TEMF, Computational Electromagnetic Laboratory)
Prof. Dr. Jürgen Rödel (NAW, Ceramics Group)


Xiao Wang


Dolivostraße 15

D-64293 Darmstadt



+49 6151 16 - 24401 or 24402


+49 6151 16 - 24404




wang (at) gsc.tu...

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