Bicephalous transformed media: concentrator versus rotator and cloak versus superscatterer Guenneau, Sébastien ; Petiteau, David ; Zerrad, Myriam ; Amra, Claude Abstract Publication: Optics Express Pub Date: September 2014 DOI: 10.1364/OE.22.023614 Bibcode: 2014OExpr..2223614G