Optical moebius strips
http://physicsworld.com/cws/article/news/2015/jan/29/how-to-twist-light-into-a-mobius-strip
http://www.sciencenewsline.com/articles/2015021313150037.html
http://www.ecnmag.com/news/2015/02/winding-light-wave-moebius-strip
http://www.eurekalert.org/pub_releases/2015-02/m-lit021215.php
http://www.nanowerk.com/nanotechnology-news/newsid=38985.php
