基于纳米间隙工程的高传输效率长波红外多光谱调制阵列

IF 3.1 3区 物理与天体物理 Q2 INSTRUMENTS & INSTRUMENTATION Infrared Physics & Technology Pub Date : 2024-09-15 DOI:10.1016/j.infrared.2024.105559
Ke Deng , Yunlong Xiao , Dezheng Guo , Ting He , Jiacheng Wang , Yihang Zhou , Qing Li , Ning Li , Peng Wang
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引用次数: 0

摘要

长波红外光谱在分子指纹识别和大气传输方面具有独特的优势,因此被广泛应用于检测、识别、医疗诊断和环境监测等领域。因此,开发具有高传输效率的多光谱结构阵列一直备受关注。在这项研究中,我们介绍了一种基于复杂纳米间隙工程的高传输效率纳米轴场增强结构阵列,在 3% 的开放区域内显示出 21.59% 的传输率,同时纳米间隙场增强了 90 倍。通过对纳米间隙的调制,绝对传输率可超过 60%。光谱可调谐阵列的实验数据和有限元模拟结果证实,共振的起因是纳米间隙支持的增强局部电磁模式。此外,我们还在分子共振吸收增强和材料成分分析等实际应用中展示了所提出的纳米轴场增强结构。我们的工作不仅为长波红外范围的片上多光谱调谐提供了一种方法,而且有助于进一步推动长波红外纳米光子结构的发展。
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High transmission efficiency long-wave infrared multispectral modulation array based on nanogap engineering

The long-wave infrared spectrum’s unique advantages in molecular fingerprinting and atmospheric transmission have led to its widespread application in detection, identification, medical diagnosis, and environmental monitoring. Consequently, there has been a strong focus on developing multispectral structure arrays with high transmission efficiency. In this study, we introduce a high-transmission-efficiency nanocoaxes field enhancement structures array based on complex nanogap engineering, exhibiting a transmission of 21.59 % within an open area of 3 % and accompanied by a 90-fold enhancement of the nanogap field. With the modulation of nanogaps, the absolute transmission can exceed 60 %. The experimental data and finite element simulation results of the spectrally tunable array confirm that the origin of resonance is attributed to the enhanced localized electromagnetic modes supported by nanogaps. Furthermore, we demonstrated the proposed nanocoaxes field-enhancement structures in practical applications such as molecular resonance absorption enhancement and material composition analysis. Our work not only provides a method for on-chip multispectral tuning in the long-wave infrared range but also contributes to further advancing the development of long-wave infrared nanophotonic structures.

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来源期刊
CiteScore
5.70
自引率
12.10%
发文量
400
审稿时长
67 days
期刊介绍: The Journal covers the entire field of infrared physics and technology: theory, experiment, application, devices and instrumentation. Infrared'' is defined as covering the near, mid and far infrared (terahertz) regions from 0.75um (750nm) to 1mm (300GHz.) Submissions in the 300GHz to 100GHz region may be accepted at the editors discretion if their content is relevant to shorter wavelengths. Submissions must be primarily concerned with and directly relevant to this spectral region. Its core topics can be summarized as the generation, propagation and detection, of infrared radiation; the associated optics, materials and devices; and its use in all fields of science, industry, engineering and medicine. Infrared techniques occur in many different fields, notably spectroscopy and interferometry; material characterization and processing; atmospheric physics, astronomy and space research. Scientific aspects include lasers, quantum optics, quantum electronics, image processing and semiconductor physics. Some important applications are medical diagnostics and treatment, industrial inspection and environmental monitoring.
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