Room-Temperature Circularly Polarized Single Photon Emission from Eu3+/Organic Complexes Coupled to Chiral Plasmonic Nanocavity.

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-10-01 DOI:10.1021/acs.nanolett.5c03052

Kaixiang Liang,Yong Li,Shiyu Fan,Tao Ding

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Abstract

Room-temperature circularly polarized single-photon sources are crucial for quantum information and photonic technologies. Here we integrated europium (Eu3+)-doped organic complexes with chiral plasmonic nanocavities using helicoid-on-mirror (HoM) architecture, achieving giant circularly polarized emission with quantum yield of 40% and dissymmetry factor (glum) of 0.40 ± 0.02. The HoM's superchiral hotspot enhances chiral emission through the Purcell effect. Nonlinear dynamics confirms the transition from spontaneous to stimulated chiral photon generation with reduced threshold power. Time-resolved fluorescence spectroscopy shows enhanced radiative rates (0.7 μs vs 360 μs bulk), indicating efficient plasmon-exciton coupling. Single-photon emission with circular polarization characteristics is demonstrated by photon antibunching (g(2) = 0.30 ± 0.05) at room temperature when the pumping power is below 20 μW. This integration of lanthanide photophysics with chiral plasmonics provides scalable pathways for room-temperature quantum chiral photonics, with applications in quantum information encoding, chiral sensing, and circularly polarized organic light-emitting diodes.

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手性等离子体纳米腔耦合Eu3+/有机配合物的室温圆偏振单光子发射。

室温圆偏振单光子源对于量子信息和光子技术至关重要。本文采用镜上螺旋结构（HoM）将铕（Eu3+）掺杂有机配合物与手性等离子体纳米腔集成，实现了量子产率为40%、不对称因子（glum）为0.40±0.02的巨圆极化发射。HoM的超手性热点通过Purcell效应增强了手性发射。非线性动力学证实了从自发到受激手性光子产生的转变，并降低了阈值功率。时间分辨荧光光谱显示增强的辐射率（0.7 μs vs 360 μs体积），表明有效的等离子体-激子耦合。在室温下，当泵浦功率低于20 μW时，通过光子反聚束（g(2) = 0.30±0.05）证明了单光子发射具有圆偏振特性。镧系光物理与手性等离子体的集成为室温量子手性光子学提供了可扩展的途径，应用于量子信息编码、手性传感和圆极化有机发光二极管。

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

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.