CaF2 absorption coefficient

We have also calculated the absorption coefficient a (see Figure 37 bottom panel) that can be compared with optical absorption measurements performed on Si/CaF2 MQW s synthesized by molecular beam epitaxy [44,46] (see Figure 37 top panel). A striking resemblance between the two results is evident. In both results we observe a blue-shift of the onset and moreover a decrease of the optical absorption with decreasing Si layer thickness. The discrepancy in the absolute value of a(co) is a consequence of the use of the repeated slab scheme in the calculations. 

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