Light scattering by a sphere dimer: Extinction cross section
  
Extinction (= light scattering + absorption) cross section of a sphere dimer, calculated from MESME (see F. J. García de Abajo, Phys. Rev. B 60, 6086 (1999)) up to an iteration order as specified below.
Dielectric function ε1(ω)

For Drude (ignored otherwise):
ε(ω)=1-ωp2/ω(ω+iη)
ωp (eV) =
η (eV) =

Geometry under consideration

Dielectric function ε2(ω)
Same as ε1(ω): Yes
No
Polarization
Parallel
Perpendicular
Geometrical parameters Left-sphere radius a (nm) =
Right-sphere radius b (nm) =
Surface-to-surface distance d (nm) =
Other parameters ωmin(eV) =     ωmax(eV) =
lmax = (maximum orbital momentum no. ≤ 25)
Iteration order = (maximum iteration order ≤ 60)
Dielectric function of the environment, ε0 =