Loss induced negative refraction and super-prism effect at highly absorptive interface

Wu Jian^{1, 4, †}, Wang Tao¹, Hou Tianyue¹, Kan Xuefen², Yin Cheng^{2, 3, 4}, Zhou Pu^{1, ‡}, Cao Zhuangqi³

(a) Super-prism effect around the frequency ω_b at the edge between the positive and negative regions, where the equifrequency contour of ω_b locates at the most outside. (b) Equifrequency contours of the medium with anomalous dispersion, and ω_b corresponds to the boundary frequency with the biggest size.