{"id":168,"date":"2017-09-14T12:52:54","date_gmt":"2017-09-14T10:52:54","guid":{"rendered":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/?page_id=168"},"modified":"2017-09-14T13:01:01","modified_gmt":"2017-09-14T11:01:01","slug":"switchable-blue-phase-gratings-by-nsl","status":"publish","type":"page","link":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/switchable-blue-phase-gratings-by-nsl\/","title":{"rendered":"Switchable blue phase gratings by NSL"},"content":{"rendered":"<div class=\"twoclick_social_bookmarks_post_168 social_share_privacy clearfix 1.6.4 locale-de_DE sprite-de_DE\"><\/div><div class=\"twoclick-js\"><script type=\"text\/javascript\">\/* <![CDATA[ *\/\njQuery(document).ready(function($){if($('.twoclick_social_bookmarks_post_168')){$('.twoclick_social_bookmarks_post_168').socialSharePrivacy({\"txt_help\":\"Wenn Sie diese Felder durch einen Klick aktivieren, werden Informationen an Facebook, Twitter, Flattr, Xing, t3n, LinkedIn, Pinterest oder Google eventuell ins Ausland \\u00fcbertragen und unter Umst\\u00e4nden auch dort gespeichert. N\\u00e4heres erfahren Sie durch einen Klick auf das <em>i<\\\/em>.\",\"settings_perma\":\"Dauerhaft aktivieren und Daten\\u00fcber-tragung zustimmen:\",\"info_link\":\"http:\\\/\\\/www.heise.de\\\/ct\\\/artikel\\\/2-Klicks-fuer-mehr-Datenschutz-1333879.html\",\"uri\":\"https:\\\/\\\/blogs.uni-paderborn.de\\\/kbrassat\\\/switchable-blue-phase-gratings-by-nsl\\\/\",\"post_id\":168,\"post_title_referrer_track\":\"Switchable+blue+phase+gratings+by+NSL\",\"display_infobox\":\"on\"});}});\n\/* ]]> *\/<\/script><\/div><div class=\"page\" title=\"Page 1\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p><strong>Two-dimensional switchable blue phase gratings manufactured by nanosphere lithography<\/strong><\/p>\n<p>See our paper: <a href=\"https:\/\/www.osapublishing.org\/oe\/abstract.cfm?uri=oe-25-19-22608\">Optics Express 25(19), 22608 (2017)<\/a><\/p>\n<p>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\u00b0.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter  wp-image-174\" src=\"https:\/\/blogs.uni-paderborn.de\/kbrassat\/files\/2017\/09\/BP-grating-Brassat-300x289.png\" alt=\"\" width=\"342\" height=\"329\" srcset=\"https:\/\/blogs.uni-paderborn.de\/kbrassat\/files\/2017\/09\/BP-grating-Brassat-300x289.png 300w, https:\/\/blogs.uni-paderborn.de\/kbrassat\/files\/2017\/09\/BP-grating-Brassat-768x741.png 768w, https:\/\/blogs.uni-paderborn.de\/kbrassat\/files\/2017\/09\/BP-grating-Brassat.png 954w\" sizes=\"auto, (max-width: 342px) 100vw, 342px\" \/><\/p>\n<div class=\"page\" title=\"Page 1\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p>This project was performed in collaboration with Dr. Markus Wahle from the physical chemistry group of Prof. H.-S. Kitzerow at Paderborn University.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Two-dimensional switchable blue phase gratings manufactured by nanosphere lithography See our paper: Optics Express 25(19), 22608 (2017) 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 [&hellip;]<\/p>\n","protected":false},"author":7828,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-168","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/pages\/168","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/users\/7828"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/comments?post=168"}],"version-history":[{"count":3,"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/pages\/168\/revisions"}],"predecessor-version":[{"id":178,"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/pages\/168\/revisions\/178"}],"wp:attachment":[{"href":"https:\/\/blogs.uni-paderborn.de\/kbrassat\/wp-json\/wp\/v2\/media?parent=168"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}