{"id":370792,"date":"2017-02-28T03:00:00","date_gmt":"2017-02-28T00:00:00","guid":{"rendered":"https:\/\/www.fyysika.ee\/?guid=fa3de638ef235ccbc74658879b3c9a59"},"modified":"2017-02-28T03:00:00","modified_gmt":"2017-02-28T00:00:00","slug":"flat-polarization-controlled-cylindrical-lens-based-on-the-pancharatnam-berry-geometric-phase-2","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=370792","title":{"rendered":"Flat polarization-controlled cylindrical lens based on the Pancharatnam\u2013Berry geometric phase"},"content":{"rendered":"<p>The working principle of ordinary refractive lenses can be explained in terms of the space-variant<br \/>\noptical phase retardations they introduce, which reshape the optical wavefront curvature and hence<br \/>\naffect the subsequent light propagation. These phases, in turn, are due to the varying optical path<br \/>\nlength followed\u00a0by light at different transverse positions relative to the lens center. A similar<br \/>\nlensing behavior can, however, be obtained when the optical phases are introduced by an entirely<br \/>\ndifferent mechanism. Here, we consider the \u2018geometric phases\u2019 that arise from the polarization<br \/>\ntransformations occurring in anisotropic optical media, named after Pancharatnam and Berry. The<br \/>\nmedium anisotropy axis is taken to be space-variant in the transverse plane and the resulting<br \/>\nvarying geometric phases give rise to the wavefront reshaping and lensing effect, which however<br \/>\nalso\u00a0depends\u00a0on the input polarization. We describe the realization and characterization of a<br \/>\ncylindrical geometric-pha&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The working principle of ordinary refractive lenses can be explained in terms of the space-variant<br \/>\noptical phase retardations they introduce, which reshape the optical wavefront curvature and hence<br \/>\naffect the subsequent light propagation. These phase&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-370792","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/370792","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=370792"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/370792\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=370792"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=370792"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=370792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}