標題: High optical nonlinearity in low-dimensional halide perovskite polycrystalline films
作者: Liang, Wei-Yun
Liu, Fangzhou
Lu, Yu-Jung
Popovic, Jasminka
Djurisic, Aleksandra
Ahn, Hyeyoung
光電工程學系
Department of Photonics
公開日期: 17-Aug-2020
摘要: 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
URI: http://dx.doi.org/10.1364/OE.394172
http://hdl.handle.net/11536/155412
ISSN: 1094-4087
DOI: 10.1364/OE.394172
期刊: OPTICS EXPRESS
Volume: 28
Issue: 17
起始頁: 24919
結束頁: 24927
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