Strong Coupling between Moiré-Type Plasmons and Phonons in Suspended Monolayer Metallic Twisted Superlattices

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2024-11-20 DOI:10.1021/acs.nanolett.4c04841

Bin You, Yuhan Du, Shuangxiu Yuan, Yuan Tian, Xianghao Meng, Wenbin Wu, Zeping Shi, Guangyi Wang, Xin Chen, Xiang Yuan, Xiaolong Zhu

引用次数: 0

Abstract

We demonstrate both experimentally and analytically a strong coupling phenomenon between moiré-type plasmons and phonons within moiré superlattices. We study the dependence of moiré wave vector and the twist angle and numerically simulate and experimentally fabricate metallic moiré superlattices on a suspended thin film SiO₂ substrate at different twist angles. The results suggest that the coupling strength initially increases and then decreases with increasing twist angles. When the twist angle is at 16.26°, we achieve a moiré-type plasmon-phonon strong coupling with a Rabi splitting strength approaching 45 meV. We further analyze the coupling system by utilizing the coupled-harmonic-oscillators theory and quantum mechanical theory. The calculations and numerical simulations further agree with the experimental results. The proposed strong coupling system has the potential to contribute substantially to electromagnetic field controlling and coupling.

Abstract Image

查看原文本刊更多论文

悬浮单层金属扭转超晶格中 Moiré 型质子与声子之间的强耦合

我们通过实验和分析证明了摩尔纹超晶格内摩尔纹型质子与声子之间的强耦合现象。我们研究了摩尔纹波矢量与扭转角的关系，并在悬浮薄膜二氧化硅基底上以不同扭转角数值模拟和实验制作了金属摩尔纹超晶格。结果表明，随着扭转角的增大，耦合强度先增大后减小。当扭转角为 16.26°时，我们实现了莫尔型质子-声子强耦合，拉比分裂强度接近 45 meV。我们利用耦合谐振子理论和量子力学理论进一步分析了耦合系统。计算和数值模拟结果与实验结果进一步吻合。所提出的强耦合系统有可能为电磁场控制和耦合做出重大贡献。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

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.