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Abstract
Infrared spectroscopy experiments in the 15–149 THz spectral regime were performed in the transmission mode on a thin film of bulk Parylene-C polymer at normal incidence. The relative permittivity of bulk Parylene-C polymer in this regime was modeled as comprising a frequency-independent term as well as contributions from 32 Lorentz oscillators. A least-squares minimization algorithm and a hybrid genetic algorithm were used to determine the frequency-independent term as well as all parameters characterizing the Lorentz oscillators from the measured transmittance spectrum itself.
Acknowledgements
We thank Dr. Joshua J. Stapleton and Prof. Michael T. Lanagan of the Pennsylvania State University (PSU) for helpful discussions. We are grateful to the Materials Characterization Laboratories of the PSU Materials Research Institute for experimental facilities provided under the aegis of the National Science Foundation Cooperative Agreement No. ECS-0335765. We also thank the Research Computing and Cyberinfrastructure unit of the PSU Institute of Cyberscience for computing resources. Finally, we gratefully acknowledge the Charles Godfrey Binder Endowment at PSU and the President and the Council of the Taibah University for partial financial support.