Opt Lett. 2022 Nov 1;47(21):5573-5576. doi: 10.1364/OL.474280.
Quasi-2D Ruddlesden-Popper-type perovskites (RPPs) exhibit excellent nonlinear optical properties due to their multiple quantum well structures with large exciton binding energy. Herein, we introduce chiral organic molecules into RPPs and investigate their optical properties. It is found that the chiral RPPs possess effective circular dichroism in the ultraviolet to visible wavelengths. Two-photon absorption (TPA)-induced efficient energy funneling from small- to large-n domains is observed in the chiral RPP films, which induces strong TPA with a coefficient up to 4.98 cm MW. This work will broaden the application of quasi-2D RPPs in chirality-related nonlinear photonic devices.
准二维 Ruddlesden-Popper 型钙钛矿（RPPs）因其具有大激子结合能的多量子阱结构，表现出优异的非线性光学性能。本文将手性有机分子引入 RPPs 中，并研究了它们的光学性质。结果表明，手性 RPPs 在紫外至可见光波长范围内具有有效的圆二色性。在手性 RPP 薄膜中观察到从小域到大域的双光子吸收（TPA）诱导的有效能量漏斗效应，这导致了高达 4.98 cm MW 的强 TPA。这项工作将拓宽准二维 RPPs 在与手性相关的非线性光子器件中的应用。
