Full text loading...
(a) Measured (squares) and calculated (solid line) reflection spectra for an amorphous Si inverse opal along  with a lattice constant of . The calculation used the measured complex dielectric function. (b) Measured (squares) and calculated (solid line) . The pump-probe delay was 1 ps and the pump (probe) fluence was 200 . The calculation used the transfer matrix method and the change in the dielectric function was estimated from the Drude model. is also calculated (dotted line) using only changes in . (c) Measured (squares), as in (b), except for a pump-probe delay of 15 ps. The result of a 1 nm blueshift of the reflection spectrum from (a) is also shown (solid line) for comparison. The experimental broadening at the edges of the PBG may be due to a spatially inhomogeneous carrier distribution.
vs pump-probe delay time with the pump (probe) fluence at 500 . Decays for the edges of the PBG, 1320 and 1430 nm, are shown.
Reflection spectra for a Si inverse opal as a function of temperature, . (a) The sample after storage in ambient for over a year. (b) After removing the native oxide. (c) After annealing in air at .
Article metrics loading...