Research of Liquid Crystal Properties for Micro-Photonic Devices
Technical Report,01 Oct 2014,30 Sep 2019
Kent State University Kent United States
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Major Goals Microphotonic devices that consist of micron-sized preformed cavities filled with an active optical material would be useful for important DoD applications. At the forefront of these applications is a thermal imager. In this device a liquid crystal material needs to be aligned along a specified direction in the cavity by an alignment layer. Previous work has shown that anchoring energies of this order are possible with a class of alignment layer materials based on azo dyes. But azo dye alignment layers have been shown to be unstable, and very little is has been reported concerning the underling physics related to this problem. This project is to research and improve the properties of azo-dye photoalignment layers for liquid crystal based micro-photonic devices. Key to this understanding will be knowledge about how the azodye materials organize, align and bond to a surface.
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