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We model the optical constants of 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) using a modified Lorentz oscillator model and compare our results to the conventional Lorentz oscillator model. It is found that an adjustable broadening function incorporated in the modified Lorentz oscillator model should be used instead of a Lorentzian broadening function in the conventional oscillator model...
In this work, we propose a method for calculating the real and imaginary part of the index of refraction N=n-ik and the film thickness d of absorbing thin films from normal incidence reflectance R and transmittance T measurements. The method determines the film thickness and the index of refraction values at all experimental points simultaneously, utilizing the fact that both the real and imaginary...
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