Two-dimensional switchable blue phase gratings manufactured by nanosphere lithography Wahle, M. Brassat, Katharina Ebel, J. Bürger, Julius Lindner, Jörg Kitzerow, Heinz-Siegfried ddc:530 Switchable two dimensional liquid crystal diffraction gratings are promising can- didates 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 adiffractionangle of 21.4°. 2017 info:eu-repo/semantics/article doc-type:article text http://purl.org/coar/resource_type/c_6501 https://ris.uni-paderborn.de/record/3997 Wahle M, Brassat K, Ebel J, Bürger J, Lindner J, Kitzerow H-S. Two-dimensional switchable blue phase gratings manufactured by nanosphere lithography. <i>Optics Express 25</i>. 2017;25(19):22608-22619. doi:<a href="https://doi.org/10.1364/OE.25.022607">10.1364/OE.25.022607</a> eng info:eu-repo/semantics/altIdentifier/doi/10.1364/OE.25.022607 info:eu-repo/semantics/closedAccess