w****o
发帖数: 20 | 1 Only when the laser energy is below the bandgap of these two materials.
Because refractive index will have imaginary part when above the bandgap Eg,
ie, N(E)=n(E)+i*k(E), k>0 when E>Eg; and k_material1 can be diffrent from
k_material2 if they are nonzero.
Reflection is
R=((1-n)^2+k^2)/((1+n)^2+k^2). |
|
