期刊
OPTICS EXPRESS
卷 28, 期 17, 页码 24919-24927出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.394172
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- Ministry of Science and Technology, Taiwan [107-2112-M-009-015-MY3, 107-2923-M-009-003-MY3]
- Academia Sinica [AS-CDA-108-M08]
- Science, Technology and Innovation Commission of Shenzhen Municipality [JCYJ20170818141216288]
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)PbI4 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. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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