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Lookup NU author(s): Dr Dumitru Sirbu,
Dr Hei TsuiORCiD,
Susana Iglesias Porras,
Dr Pablo Docampo,
Professor Noel HealyORCiD
This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Chemical Society, 2021.
For re-use rights please refer to the publisher's terms and conditions.
© This paper establishes the potential of the recently introduced ABX3 metal-free perovskite structures for third-order nonlinear optical processes. The base unit in this family of materials is an ammonium halide octahedra, and it incorporates a large aromatic cation spacer forming the classic perovskite structure. This work shows that the choice of cation is key to the resulting third-order nonlinearity, where the incorporation of "MDABCO"into the structure, a very polar cation, results in a third-order nonlinear refractive index on the order of 10-17 m2 W-1 and high laser damage threshold of 0.8 J cm-2. Owing to its very wide band gap of ∼5.12 eV, this material exhibits a high nonlinear figure of merit across the visible and near-infrared transmission windows. These results show that the metal-free family of perovskite materials is an excellent candidate for nonlinear optics in the important visible and near-infrared wavelength regimes.
Author(s): Sirbu D, Tsui HCL, Alsaif N, Iglesias-Porras S, Zhang Y, Wang M, Liu M, Peacock AC, Docampo P, Healy N
Publication type: Article
Publication status: Published
Journal: ACS Photonics
Print publication date: 18/08/2021
Online publication date: 14/07/2021
Acceptance date: 07/05/2021
Date deposited: 19/08/2021
ISSN (electronic): 2330-4022
Publisher: American Chemical Society
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