“…34 The following complex dielectric function is used in non-linear least squares fit to gain insights into their refractive index and dispersive behaviour, where detail on the parameters is given in the ESI† (SI-3 and SI-5).
The estimated values from these fittings for both oscillators have been given in Tables S1–S4 of the ESI† (SI-4). In accordance with our last fitting analysis, 11,21 we procure precise values of physical parameters such as ε ∞ , ω o , ω p and ϒ (for Drude oscillator, given in Table 2) to extract genuine behaviour of complex optical dispersions in terms of refractive index and dielectric constants for CuS:Al nanostructured films.…”