Modeling optical constants from the absorption of organic thin films using a modified Lorentz oscillator model
Toppari J. Jussi; Qureshi Hassan Ali; Duarte Luís; Dutta Arpan; Tiainen Ville
Modeling optical constants from the absorption of organic thin films using a modified Lorentz oscillator model
Toppari J. Jussi
Qureshi Hassan Ali
Duarte Luís
Dutta Arpan
Tiainen Ville
Optica Publishing Group
Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2022091258807
https://urn.fi/URN:NBN:fi-fe2022091258807
Tiivistelmä
Optical constants of organic thin films can be evaluated using the Lorentz oscillator model (LOM) which fails to fit inhomogeneously broadened absorption of highly concentrated molecular films. In modified LOM (MLOM), the inhomogeneous broadening is implemented through a frequency-dependent adjustable broadening function. In this work, we evaluate the optical constants of rhodamine 6G doped poly-vinyl alcohol thin films with varying doping concentration (including also extensively high concentrations) using MLOM, which outperforms LOM by showing a better agreement with the experimental results. Our proposed method provides a way to accurately determine optical constants of isotropic organic thin films only from their absorption spectra without spectroscopic ellipsometry.
Kokoelmat
- Rinnakkaistallenteet [19207]