Transmission spectra of .
Changes in the optical absorption edge during irradiation as a function of time. Inset: variation of Tauc parameter during irradiation.
Time evolution of absorption coefficient with time at indicated wavelengths. The laser on state is indicated in the figure.
XPS spectra of as prepared and irradiated (at different times) nanolayered films. Please note that there was no peak for the as prepared sample. However after irradiating the sample, we can clearly see the signal from peak.
XPS spectra of as prepared and irradiated (at different times) nanolayered films. Please note that with irradiation the Se peaks shift to lower BE, which clearly indicating the formation of As–Se bond.
Hollow circles represent the rise in optical absorption edge during photodarkening and the solid line (red) shows the theoretical fit using Eq. (3). Inset: the solid squares show the decay of optical absorption edge during photoinduced diffusion and solid line (red) represents the theoretical fit to .
Fitting parameters obtained from fitting Eqs. (3) and (4) to the calculated rise and fall of the absorption coefficient at different wavelengths.
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