{"id":40867,"date":"2023-06-03T10:47:40","date_gmt":"2023-06-03T10:47:40","guid":{"rendered":"https:\/\/www.labri.fr\/perso\/barla\/blog\/?p=40867"},"modified":"2023-06-03T14:49:19","modified_gmt":"2023-06-03T14:49:19","slug":"structural-colors-iridescence","status":"publish","type":"post","link":"https:\/\/www.labri.fr\/perso\/barla\/blog\/?p=40867","title":{"rendered":"Structural colors &#038; iridescence"},"content":{"rendered":"<p id=\"top\" \/>\n<p><em><strong>\u2794<\/strong><\/em> <em><strong>What is the space of appearances that can be achieved by bio-inspired, irregular photonic structures<strong><em>, with potential iridescenc<\/em><\/strong>e ?<\/strong><\/em><\/p>\n\n\n\n<div style=\"height:18px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Inverse Design<\/h3>\n\n\n\n<p>Find photonic crystal structure that achieves target colors at different incidences.<\/p>\n\n\n\n<p>Rely on piecewise approximation as a proxy to navigate the space of reflectance colors.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Cholesterics<\/h3>\n\n\n\n<p>Extend layered Bragg structures to deal with tilted cholesteric structures.<\/p>\n\n\n\n<p>Deal with circular polarization in light propagation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Iridescence cues<\/h3>\n\n\n\n<p>Perception of thin-film reflectance for different TF configurations and roughnesses.<\/p>\n\n\n\n<p>One potential cue is the color distribution in the image (VS the background?)<\/p>\n\n\n\n<p>Another is the hue VS specular flow structures.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Bragg mirrors<\/h3>\n\n\n\n<p>Approximation of Bragg reflectance for fast RGB evaluation.<\/p>\n\n\n\n<p>Transmittance filter due to roughness for rendering Bragg layers.<\/p>\n\n\n\n<p><em>\u2192&nbsp;Extend filter to reflectance? Consider irregularities on the nano-scale?<\/em><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Flavometrics<\/h3>\n\n\n\n<p>Empirical reproduction of the appearance of flavobacteria from multi-angle photographs.<\/p>\n\n\n\n<p><em>\u2192&nbsp;Which knowledge of photonic crystals could be used to better generalize appearance to different conditions?<\/em><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Thin films<\/h3>\n\n\n\n<p>Thin-film reflectance, re-expressed in Fourier space, provides direct intuition over produced colors<\/p>\n\n\n\n<p><em>\u2192&nbsp;How do iridescent color fringes vary with material parameters?<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u2794 What is the space of appearances that can be achieved by bio-inspired, irregular photonic structures, with potential iridescence ? Inverse Design Find photonic crystal structure that achieves target colors at different incidences. Rely on piecewise approximation as a proxy to navigate the space of reflectance colors. Cholesterics Extend layered Bragg structures to deal with &#8230; <a title=\"Structural colors &#038; iridescence\" class=\"read-more\" href=\"https:\/\/www.labri.fr\/perso\/barla\/blog\/?p=40867\" aria-label=\"Read more about Structural colors &#038; iridescence\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[774],"tags":[],"class_list":["post-40867","post","type-post","status-publish","format-standard","hentry","category-projects"],"_links":{"self":[{"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/posts\/40867","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=40867"}],"version-history":[{"count":7,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/posts\/40867\/revisions"}],"predecessor-version":[{"id":40905,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=\/wp\/v2\/posts\/40867\/revisions\/40905"}],"wp:attachment":[{"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=40867"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=40867"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.labri.fr\/perso\/barla\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=40867"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}