Nonlinear Absorption in 2D Ruddlesden–Popper Perovskites: Pathways to Ultrafast Optical Applications

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry Letters Pub Date : 2024-09-16 DOI:10.1021/acs.jpclett.4c01673

Ja-Hon Lin, Jen-Feng Hsu, Yi-Chung Yang, ChunChe Lin, Chiung-Cheng Huang, YanQi Ge

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Abstract

Owing to their distinctive photophysical properties resulting from their larger exciton binding energy and the influence of dielectric and quantum confinement effects, considerable research interest has been directed toward two-dimensional Ruddlesden–Popper halide perovskites (2D RP-HPs). Particularly, 2D RP-HPs exhibit exceptional multiphoton absorption (MPA) effects that reveal versatile applications. In this work, two-photon absorption (2PA) and three-photon absorption (3PA) in 2D RP-HPs, specifically (PEA)₂PbBr₄ and (BA)₂PbBr₄ platelets, have been demonstrated through their photoluminescence spectra under multiphoton excitation, revealing a power law relationship with excitation energy. On the other hand, polarization-dependent MPA measurements are also conducted to obtain their anisotropy properties. The excellent 2PA and 3PA effects of 2D RP-HPs have found applications in ultrafast optics to construct fringe-resolved autocorrelation traces, enabling the retrieval of pulse duration not only passively mode-locked Ti:sapphire at 800 nm but also Yb-doped fiber lasers at 1030 nm.

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二维 Ruddlesden-Popper Perovskites 中的非线性吸收：通向超快光学应用的途径

由于二维 Ruddlesden-Popper 卤化物包晶（2D RP-HPs）具有较大的激子结合能以及介电和量子约束效应的影响，因而具有独特的光物理特性。特别是，二维 RP-HPs 显示出特殊的多光子吸收（MPA）效应，揭示了其多方面的应用。这项研究通过多光子激发下的光致发光光谱证明了二维 RP-HPs 的双光子吸收（2PA）和三光子吸收（3PA），特别是 (PEA)2PbBr4 和 (BA)2PbBr4 小板。另一方面，还进行了偏振相关的 MPA 测量，以获得它们的各向异性特性。二维 RP-HPs 卓越的 2PA 和 3PA 效应已被应用于超快光学领域，用于构建条纹分辨自相关轨迹，不仅能检索 800 纳米被动模式锁定的钛蓝宝石脉冲持续时间，还能检索 1030 纳米掺镱光纤激光器的脉冲持续时间。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.