Abstract

Due to their unique features, perylenediimide derivatives attracted much interest in optical and optoelectronic applications. Along this line, we report herein the optical nonlinearity of a water-soluble perylenediimide derivative, namely, N, N’-di(2-(trimethylammonium iodide)ethylene) perylenediimide (TAIPDI), using a femtosecond (fs) laser pulse at various excitation wavelengths and incident powers. The optical features of light-harvesting TAIPDI in both water and methanol were examined using steady-state absorption and emission and time-resolved emission techniques. The linear and third-order nonlinear optical (NLO) properties of TAIPDI dye have been examined. When changing the solvent from water to methanol, the NLO properties of TAIPDI dye were significantly changed. The TAIPDI dye's nonlinear refractive index (n2) ascribes self-defocusing, while the nonlinear absorption coefficient (β) shows reverse saturable absorption. The magnitudes of β were on the order of 10−10 and 10−9 cm/W for the 7.2 × 10−6 M solutions of this dye in water and methanol, respectively. The n2 of the TAIPDI dye in methanol is three times greater than that of the dye in water at the same excitation power, wavelength, and dye concentration. The variations in the nonlinear absorption coefficient and nonlinear refractive index of water and methanol may be due to the strong aggregative behavior of dye molecules in water. The third-order NLO susceptibility of TAIPDI dye in water and methanol was measured on the order of 10−13 esu. The results also show that TAIPDI solutions present a relatively high two-photon absorption cross section (2PACS) at different excitation wavelengths, making them attractive for photonics applications. The dye's optical limiting (OL) effects at different concentrations in solution were studied. The optical results revealed that the TAIPDI dye is a good candidate for optical limiter applications.

Original languageEnglish
Article number126679
JournalJournal of Molecular Liquids
Volume418
DOIs
Publication statusPublished - 15 Jan 2025

Keywords

  • Femtosecond laser
  • Nonlinear optical properties
  • Nonlinear refractive index
  • Optical limiting effect
  • Perylene dye
  • Two-photon absorption cross-section
  • Z-scan technique

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