Tunable Low Threshold Optical Tristability at Terahertz Frequencies via a Pair of Parallel Graphene Layers’ Configuration

Figure 2

(a) Schematic diagram of the transmitted electric field as a function of the incident electric field for different Fermi energies of the graphene. (b) Schematic diagram of the switch-up and switch-up threshold electric field as a function of .

(a)

(b)