Imaging and simulation of surface plasmon polaritons on layered 2D MXenes

IF 12.5 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Advances Pub Date : 2025-03-21 DOI:10.1126/sciadv.ads3689

Janek Rieger, Atreyie Ghosh, Joseph L. Spellberg, Calvin Raab, Aishani Mohan, Prakriti P. Joshi, Sarah B. King

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Abstract

Two-dimensional (2D) transition metal carbides and nitrides, commonly known as MXenes, are a class of 2D materials with high free carrier densities, making them highly attractive candidates for plasmonic 2D materials. In this study, we use multiphoton photoemission electron microscopy (nP-PEEM) to directly image the plasmonic near fields of multilayers of the prototypical MXene, Ti₃C₂T_x, with mixed surface terminations (T_x = F, O, and OH). Photon-energy dependent nP-PEEM reveals a dispersive surface plasmon polariton between 1.4 and 1.9 electron volts on MXene flakes thicker than 30 nanometers and waveguide modes above 1.9 electron volts. Combining experiments with finite-difference time-domain simulations, we reveal the emergence of a visible surface plasmon polariton in MXenes, opening avenues for exploration of polaritonic phenomena in MXenes in the visible portion of the electromagnetic spectrum.

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层状二维MXenes表面等离子激元的成像与模拟

二维（2D）过渡金属碳化物和氮化物，通常被称为MXenes，是一类具有高自由载流子密度的二维材料，使其成为极具吸引力的等离子体二维材料候选者。在这项研究中，我们使用多光子光电发射电子显微镜（n P-PEEM）直接成像具有混合表面末端（T x = F， O和OH）的典型MXene， Ti 3c2tx多层的等离子体近场。光子能量依赖的P-PEEM显示，在厚度大于30纳米的MXene薄片上存在1.4 ~ 1.9电子伏特的色散表面等离子激元极化子，波导模式高于1.9电子伏特。结合实验和时域有限差分模拟，我们揭示了MXenes中可见表面等离子激元极化子的出现，为探索电磁波谱可见部分MXenes中的极化现象开辟了道路。

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

Science Advances 综合性期刊-综合性期刊

CiteScore

21.40

自引率

1.50%

发文量

1937

审稿时长

29 weeks

期刊介绍： Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.