@article{07cf5ca69da842a4ae114d61bbeb1800,
title = "Femtosecond induced third-order optical nonlinearity in quasi 2D Ruddlesden-Popper perovskite film deciphered using Z-scan",
abstract = "Ruddlesden-Popper perovskite is a class of layered halide perovskite which gained much attention over the past few years in the field of photovoltaics. Herein, we have presented a compendious sketch of third-order nonlinear optical (NLO) properties of (PEA)2Cs4Pb5Br16, a quasi-two-dimensional (2D) perovskite using femtosecond Z-scan technique at 800 nm. Our open aperture (OA) Z-scan measurements unveiled saturable absorption (SA) behaviour of the 2D perovskite with a nonlinear absorption coefficient of −13.83 cm GW−1, which is an order of magnitude higher than other 2D materials. Nonetheless, the self-defocusing effect has been demonstrated using a closed aperture (CA) Z-scan measurement. High nonlinear absorption coefficient and low saturation intensity (38.81 GW cm−2) infer that (PEA)2Cs4Pb5Br16 perovskite film could be useful for ultrafast photonic applications.",
author = "Aamir Mushtaq and Bapi Pradhan and Dushyant Kushavah and Yiyue Zhang and Denys Naumenko and Heinz Amenitsch and Johan Hofkens and Pal, {Suman Kalyan}",
note = "Funding Information: A. M. is thankful to IIT Mandi for his fellowship and Advanced Materials Research Centre for the experimental facilities; B. P. acknowledges a postdoctoral fellowship from the Research Foundation-Flanders (FWO Grant no. 1275521N); Y. Z. acknowledge support from the China Scholarship Council (No. 201908440479); J. H. acknowledges financial support from the Research Foundation–Flanders (Fonds Wetenschappelijk Onderzoek, FWO, Grant No. G0A5817N, G098319N, W002221N, S002019N, and ZW15_09-G0H6316N), the Vlaamse regering through long-term structural funding Methusalem (CASAS2, Meth/15/04), the Onderzoeksraad, KU Leuven Research Fund (iBOF-21-085 PERSIST), and the Max-Planck-Gesellschaft as MPI fellow. The authors also acknowledge the CERIC-ERIC consortium for the fast-track access to the Austrian SAXS beamline at Elettra Sincrotrone Trieste. Publisher Copyright: {\textcopyright} 2022 RSC.",
year = "2022",
month = aug,
day = "17",
doi = "10.1039/d2ma00724j",
language = "English",
volume = "3",
pages = "8211--8219",
journal = "Materials Advances",
issn = "2633-5409",
publisher = "Royal Society of Chemistry",
number = "22",
}