Table 1 The parameters used in the proposed structure geometry and its modeling.

p

Graphene grating's pitch

200 nm

w

Gap cavity width in the x direction

100 nm

a

grating's (gap) depth

200 nm

h

Depth of CaF2

550 nm

µ

Graphene on SiO2 mobility

1 m² V⁻¹ s⁻¹

V_F

Fermi velocity

10⁶ m s⁻¹

n₀

Residual charge carrier density

8.1 × 10¹¹ cm⁻²