Ultrafast All-Optical Logic Gates in Quasi-2D Perovskites

被引：0

作者：

Fu, Yulan ^{[1
]}

Zhang, Yi ^{[1
]}

Zhang, Yiwei ^{[1
]}

Wang, Jiawei ^{[1
]}

Zhang, Baohuan ^{[1
]}

Feng, Shifeng ^{[1
]}

Zhang, Xinping ^{[1
]}

机构：

[1] Institute of Information Photonics Technology, School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing,100124, China

来源：

Advanced Optical Materials | 2025年 / 13卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Circular polarization - Light emitting diodes - Photodetectors - Stark effect - Two photon processes;

D O I：

10.1002/adom.202401692

中图分类号：

学科分类号：

摘要：

Quasi-2D perovskites are widely used in solar cells, photodetectors, and light-emitting diodes (LEDs) due to their excellent optoelectronic properties and stability. However, much fewer all-optical devices are realized based on quasi-2D perovskites. Although perovskites have large nonlinear optical coefficients, the relaxation progress of excitons and carriers will slow down the response time and reduce the signal contrast of the all-optical devices. In this paper, the exciton dynamics are investigated under off-resonance excitation in quasi-2D perovskite PEA2(FAPbBr3)2PbBr4. The spin-selective optical Stark effect (OSE) is observed through circularly polarized transient absorption measurements, and a Stark shift of 3.3 meV is achieved under 1.11 eV excitation. The hot-biexciton cooling process induced by two-photon absorption is also observed. A spin-based XNOR gate is demonstrated with a response time of ≈180 fs, and the logical signal contrast is enhanced through the competition of the OSE and the hot-biexciton effect. © 2024 Wiley-VCH GmbH.

引用

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