Nanometer-Scale Cavities for Mid-Infrared Radiation via Image Phonon Polariton Resonators.

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-05-19 DOI:10.1021/acs.nanolett.5c01352

Michael Klein,Yonatan Gershuni,Alisa Perutski,Jean-Paul Hugonin,Itai Epstein

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Abstract

Surface polaritons play a pivotal role in strong light-matter interactions at the nanoscale due to their ability to confine light to deep-subwavelength dimensions. A promising class of materials exhibiting such a polaritonic response is polar dielectrics, which support surface phonon polaritons (SPhPs). While SPhPs offer significantly lower losses compared to other polaritons, their potential has been underutilized due to their limited ability to reach large confinement factors. Here, we demonstrate a system composed of silver nanocubes deposited on a SiC polar dielectric, which experimentally realizes the antisymmetric-image-phonon-polariton mode, a hybridized SPhP mode that can confine mid-infrared radiation to extremely small mode volumes, almost a billion times smaller than their free-space volume, with quality factors an order-of-magnitude greater than those of surface plasmons or graphene plasmons, surpassing values of 180. Our method is general, scalable, and applicable to any polar dielectric, opening the path for controlling and manipulating strong light-matter interactions at the nanoscale in the long-wavelength range.

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利用图像声子极化子谐振器进行中红外辐射的纳米级空腔。

由于表面极化子能够将光限制在深亚波长维度，因此在纳米尺度的强光-物质相互作用中起着关键作用。表现出这种极化响应的一类有前途的材料是极性介电材料，它支持表面声子极化子（sphp）。虽然SPhPs与其他极化相相比具有更低的损耗，但由于其达到大约束因子的能力有限，其潜力尚未得到充分利用。在这里，我们展示了一个由沉积在SiC极性电介质上的银纳米立方体组成的系统，该系统通过实验实现了反对称-图像-声子-极化子模式，这是一种杂化SPhP模式，可以将中红外辐射限制在极小的模式体积内，几乎比其自由空间体积小10亿倍，质量因子比表面等离子体或石墨烯等离子体大一个数量级，超过180。我们的方法是通用的，可扩展的，并且适用于任何极性电介质，为在长波长范围内控制和操纵纳米级强光-物质相互作用开辟了道路。

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

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.