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 |
Appears in Collections: | Articles |