%0 Journal Article %A Hazard, Christophe %A Paolantoni, Sandrine %T Spectral analysis of polygonal cavities containing a negative-index material %J Annales Henri Lebesgue %D 2020 %P 1161-1193 %V 3 %I ÉNS Rennes %U http://www.numdam.org/articles/10.5802/ahl.58/ %R 10.5802/ahl.58 %G en %F AHL_2020__3__1161_0