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Experimental reflectivity spectra of P1 sample for (solid line) and (dashed line). In the inset is reported the peak shift in an expanded horizontal scale.
Experimental data showing the thermo-optic coefficient dispersion in porous silicon for different porosities: (∎) sample P1, ; (●) sample P2, , (▴) sample P3, . The best-fit curves obtained with Bruggeman and Landau–Lifshitz models are reported as solid and dashed line, respectively.
Linear fits of the thermo-optic coefficient at vs porosity. The data are extrapolated by using the Bruggeman (∎) and Landau (◆) models, respectively.
Experimental condition used for the electrochemical formation of PSi layer. The values of porosities.
Results of the Bruggeman and Landau fitting procedures for samples at different porosities. In the third and fifth columns the differences between the experimental porosities and the numerical results are reported.
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