Electro-optic characterization of blue phase liquid crystal layers

Problem Definition:

In the framework of our research of novel electro-optic components based on liquid crystals and polymers, Cmst has commenced the study of blue phase liquid crystals. This LC mode, characterised by a number of interesting electro-optic properties, is known since a long time, but only recently it has become known how the phase can be made stable over a wide temperature range. As a result, it is now possible to learn a lot more about he unique properties of this peculiar material phase. In order to evaluate the suitability for application in our electro-optic components, we wish to conduct a thorough study of the electro-optic behaviour of test cells filled with this material.



Model of the Blue Phase arrangement [Wikipedia];  First blue phase liquid crystal display ever made [Samsung]

Objectives:

The objective of this master thesis is to conduct a complete study of the electro-optic behaviour of planparallel cells filled with blue phase liquid crystal in which transparent conductors can be used to generate an electric field. The properties that can be studied comprise: effective refractive index as a function of the applied field, reaction time to a changing electric field, as a function of cell thickness, angular dependence of the optical properties, temperature stability, spectral behaviour, ... The student will fabricate the test cells in our clean room facilities and subsequently carry out the characterisation and interpret the results.

Keywords:

blue phase, liquid crystals, experimental, measurements, characterisation, characterization

Location:

Ardoyen CMST 

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