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Intermixed Time-Dependent Self-Focusing and Defocusing Nonlinearities in Polymer Solutions.

Athanasios BogrisNikolaos A BurgerKonstantinos G MakrisBenoit LoppinetGeorge Fytas
Published in: ACS photonics (2022)
Low-power visible light can lead to spectacular nonlinear effects in soft-matter systems. The propagation of visible light through transparent solutions of certain polymers can experience either self-focusing or defocusing nonlinearity, depending on the solvent. We show how the self-focusing and defocusing responses can be captured by a nonlinear propagation model using local spatial and time-integrating responses. We realize a remarkable pattern formation in ternary solutions and model it assuming a linear combination of the self-focusing and defocusing nonlinearities in the constituent solvents. This versatile response of solutions to light irradiation may introduce a new approach for self-written waveguides and patterns.
Keyphrases
  • visible light
  • ionic liquid
  • radiation therapy
  • radiation induced
  • neural network