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

Equifrequency diagram for gold, where the parameters are ε ∞ = 7.8 , ω_p=9.1 eV, Γ=0.072 eV, Γ₀=2.8 eV, ω₁=3 eV, and γ=0.6 eV.[18]