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].