Graphene’s photonic and optoelectronic properties – A review
Wirth-Lima A J1, †, Alves-Sousa P P2, Bezerra-Fraga W1, 2
       

(a) SPPP mode energy versus KSPPP, or versus kPh sin θ + mkG for θ = 11° (solid line). (b) Those for normal incidence (adapted from Ref. [13]).