Loss induced negative refraction and super-prism effect at highly absorptive interface
Wu Jian1, 4, †, Wang Tao1, Hou Tianyue1, Kan Xuefen2, Yin Cheng2, 3, 4, Zhou Pu1, ‡, Cao Zhuangqi3
       

k as a function of the incident angle θ and angular frequency ω. The area between these two dotted lines denotes the negative refraction region d k / d ω < 0 , which is incident angle dependent.