Fig. 4: Ab-initio optical response of the GeSN bilayer for in-plane light polarization.
From: Covalent bonded bilayers from germanene and stanene with topological giant capacitance effects
a Real and imaginary parts of the dielectric function for the GeSn-bilayer, ε1(ω)(in black) and ε2(ω) (in red). b Real and imaginary parts of the refractive index for the GeSn-bilayer, n(ω) (in blue) and k(ω) (in pink).
