Research Letter

Observation of Quantum Confinement Effects with Ultrashort Excitation in the Vicinity of Direct Critical Points in Silicon Nanofilms

Figure 3

Degenerate time-resolved absorption measurements of the nanofilms where the apparent state filling is due to occupation of surface states located below the Γ1 point. The inset shows the critical points for the nanofilms obtained using ellipsometry measurements [9].
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