Modeling optical constants from the absorption of organic thin films using a modified Lorentz oscillator model

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http://hdl.handle.net/10138/346704

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Dutta , A , Tiainen , V , Qureshi , H A , Duarte , L & Toppari , J J 2022 , ' Modeling optical constants from the absorption of organic thin films using a modified Lorentz oscillator model ' , Optical materials express , vol. 12 , no. 7 , pp. 2855-2869 . https://doi.org/10.1364/OME.459938

Title: Modeling optical constants from the absorption of organic thin films using a modified Lorentz oscillator model
Author: Dutta, Arpan; Tiainen, Ville; Qureshi, Hassan Ali; Duarte, Luis; Toppari, J. Jussi
Contributor organization: INAR Physical Chemistry
Department of Chemistry
Date: 2022-07-01
Language: eng
Number of pages: 15
Belongs to series: Optical materials express
ISSN: 2159-3930
DOI: https://doi.org/10.1364/OME.459938
URI: http://hdl.handle.net/10138/346704
Abstract: 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.
Subject: DIELECTRIC FUNCTION
DIANHYDRIDE
LIMITATIONS
116 Chemical sciences
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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