High optical nonlinearity in low-dimensional halide perovskite polycrystalline films | Zendy

Wei-Yun Liang | Zendy; Fangzhou Liu | Zendy; YuJung Lu | Zendy; Jasminka Popović | Zendy; Aleksandra B. Djurišić | Zendy; Hyeyoung Ahn | Zendy

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High optical nonlinearity in low-dimensional halide perovskite polycrystalline films

Author(s) -

Wei-Yun Liang,

Fangzhou Liu,

YuJung Lu,

Jasminka Popović,

Aleksandra B. Djurišić,

Hyeyoung Ahn

Publication year - 2020

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.394172

Subject(s) - crystallite , materials science , refractive index , perovskite (structure) , optics , dielectric , halide , absorption edge , absorption (acoustics) , nonlinear optics , thin film , optoelectronics , band gap , crystallography , chemistry , inorganic chemistry , nanotechnology , laser , physics , metallurgy , composite material

The nonlinear optical properties of low-dimensional polycrystalline halide perovskite films consisting of ethylammonium (EA) and butylammonium (BA) cations are investigated using Z-scan technique. Across the band-edge, two-dimensional (BA) 2 PbI 4 exhibits a transition from saturable absorption (SA) to reverse-SA and its nonlinear absorption and nonlinear refractive index are much smaller than those of bulk counterparts. Meanwhile, EAPbI 3 with one-dimensionality of the inorganic structure shows the SA behavior both above and below band-edge and the estimated nonlinear optical parameters of polycrystalline EAPbI 3 are comparable to those of single-crystalline ones, attributed to high dielectric contrast between the inorganic and organic elements in one-dimensional structures.

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