Shuvendu Jena - PRISA

PRISA software

PRISA 1.0 software written in Python determines optical properties viz. refractive index (n), extinction co-efficient (k), absorption co-efficient (α), band gap (Eg), dispersion energy (E_d), and oscillator energy(E₀) as well as thickness (d) of thin films deposited on a transparent substrate from their measured transmission spectrum only.

Swanepoel method is used for determining n, k and d. The value of E_d and E₀ are derived using single oscillator model.
Absorption co-efficient (α) in the strong absorption region is derived using Connell and Lewis method.
Optical bandgap (Eg) is derived from α using Tauc plot.

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