Two-dimensional switchable blue phase gratings manufactured by nanosphere lithography

Switchable two dimensional liquid crystal diffraction gratings are promising candidates in beam steering devices, multiplexers and holographic displays. For these areas of applications a high degree of integration in optical systems is much sought-after. In the context of diffraction gratings this m...

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Published in:Optics express 2017-09, Vol.25 (19), p.22608-22619
Main Authors: Wahle, Markus, Brassat, Katharina, Ebel, Justus, Bürger, Julius, Lindner, Jörg K N, Kitzerow, Heinz-Siegfried
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cited_by cdi_FETCH-LOGICAL-c329t-27cfb37ff604e063e84ff85bb1c4131f8712116164cfed75aab2673a32f840ae3
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container_end_page 22619
container_issue 19
container_start_page 22608
container_title Optics express
container_volume 25
creator Wahle, Markus
Brassat, Katharina
Ebel, Justus
Bürger, Julius
Lindner, Jörg K N
Kitzerow, Heinz-Siegfried
description Switchable two dimensional liquid crystal diffraction gratings are promising candidates in beam steering devices, multiplexers and holographic displays. For these areas of applications a high degree of integration in optical systems is much sought-after. In the context of diffraction gratings this means that the angle of diffraction should be rather high, which typically poses a problem as the fabrication of small grating periods is challenging. In this paper, we propose the use of nanosphere lithography (NSL) for the fabrication of two-dimensionally structured electrodes with a periodicity of a few micrometers. NSL is based on the self-assembly of micro- or nanometer sized spheres into monolayers. It allows for easy substrate structuring on wafer scale. The manufactured electrode is combined with a liquid crystalline polymer-stabilized blue phase, which facilitates sub-millisecond electrical switching of the diffraction efficiency at a diffraction angle of 21.4°.
doi_str_mv 10.1364/OE.25.022608
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title Two-dimensional switchable blue phase gratings manufactured by nanosphere lithography
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