Femtosecond induced third-order optical nonlinearity in quasi 2D Ruddlesden-Popper perovskite film deciphered using Z-scan

Aamir Mushtaq, Bapi Pradhan, Dushyant Kushavah, Yiyue Zhang, Denys Naumenko, Heinz Amenitsch, Johan Hofkens, Suman Kalyan Pal*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)8211-8219
Number of pages9
JournalMaterials Advances
Issue number22
Publication statusPublished - 17 Aug 2022

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Materials Science(all)

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