Fifth-order nonlinear optical response of Alq3 thin films

Saleh A, Li W, Alqahtani H, Neuhaus M, Alshehri A, Bergues B, Alharbi M, Kling MF, Azzeer AM, Wang Z, Alharbi AF (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Results in Physics Elsevier

Book Volume: 37

Article Number: 105513

DOI: 10.1016/j.rinp.2022.105513

Abstract

The fifth-order optical nonlinearity of Tris-(8-hydroxyquinoline) aluminium (Alq3) thin films deposited on quartz substrates when exposed to an intense laser excitation of mid-infrared femtosecond pulses is investigated. This property was examined by generating the fifth-harmonic frequency of the driving field whose signal strength as a function of laser intensity is well described by a power-law scaling. The perturbative nature of the underlying mechanism enabled the linking of the process directly to the fifth-order nonlinear optical susceptibility χ(5). We also utilized the open-aperture z-scan for studying the nonlinear absorption aspect of the third-order nonlinear optical properties of the sample. It was found that Alq3 thin-films inherit the same saturable absorption character reported in Alq3 solutions under continuous laser excitation in the visible range, with a comparable value of the nonlinear absorption coefficient βeff (in the order of 10−2 cm/W).

Involved external institutions

King Saud University (KSU) / جامعة الملك سعود‎‎ SA Saudi Arabia (SA) Max-Planck-Institute of Quantum Optics (MPQ) / Max-Planck-Institut für Quantenoptik DE Germany (DE) Ludwig-Maximilians-Universität (LMU) DE Germany (DE) King Khalid University (KKU) / جامعة الملك خالد SA Saudi Arabia (SA) King Abdulaziz City for Science and Technology SA Saudi Arabia (SA)

How to cite

APA:

Saleh, A., Li, W., Alqahtani, H., Neuhaus, M., Alshehri, A., Bergues, B.,... Alharbi, A.F. (2022). Fifth-order nonlinear optical response of Alq3 thin films. Results in Physics, 37. https://dx.doi.org/10.1016/j.rinp.2022.105513

MLA:

Saleh, Ahmad, et al. "Fifth-order nonlinear optical response of Alq3 thin films." Results in Physics 37 (2022).

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