Abstract
We develop a new analytical method for calculating the nonlinear refractive index and the two-photon absorption coefficient of centrosymmetric materials based on the classical anharmonic oscillator model. We calculate the nonlinear dispersion properties of pure bulk water over a broad frequency range from 0.5 to 750 THz. Our model could estimate pure water’s nonlinear properties, including the nonlinear refractive index and nonlinear absorption coefficient, with appropriate accuracy, consistent with the previous experimental and theoretical results, and through a more straightforward and less complicated approach.
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The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
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FJ conceived the original idea and supervised the project. MAH developed the theoretical formalism, and performed the analytic and numerical calculations. Both authors contributed to the final version of the manuscript.
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Hemmatian, M.A., Jahangiri, F. A simplified model for predicting the nonlinear properties of water and centrosymmetric media at terahertz frequencies. Opt Quant Electron 55, 359 (2023). https://doi.org/10.1007/s11082-023-04598-y
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DOI: https://doi.org/10.1007/s11082-023-04598-y