基于表面等离子体极化子的长波红外多光谱滤波器阵列

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2024-11-08 DOI:10.1016/j.optcom.2024.131282

Yanbo Wang , Keyan Dong , Yansong Song , Mingxu Piao , Bo Zhang , Lei Zhang , Gangqi Yan , Zonglin Liang , Tianci Liu , Xinhang Li

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引用次数: 0

摘要

本研究提出了一种基于表面等离子体极化子的红外多光谱滤波器。它用于实现 8-14 μm 长波红外范围内的光学滤波。入射光与金薄膜表面激发的等离子体极化子耦合后，通过周期性亚波长通孔传播。我们利用有限差分时域（FDTD）分析了带有周期性亚波长通孔的滤波器的传输特性及其局部场分布，并进行了容差分析，以证明大规模、低成本加工的可能性。仿真结果表明，我们提出的滤波器在 8-14 μm 光谱范围内实现了四个光谱通道，峰值能量透过率高达约 60%，并且具有宽容差和偏振不敏感特性。我们提出的长波红外滤波器可为轻型多光谱设备和全天候探测提供高效、低成本的解决方案。

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Long-wave infrared multi-spectral filter arrays based on surface plasma polaritons

An infrared multi-spectral filter based on surface plasmon polaritons is proposed in this study. It is used to achieve optical filtering in the long-wave infrared range of 8–14 μm. After coupling with the plasma polaritons excited on the surface of Au film, the incident light propagates through periodic sub-wavelength through-holes. We analyzed the transmission characteristics of the filter with periodic sub-wavelength through-holes and its local field distribution using the Finite-Difference Time-Domain (FDTD), and carried out the tolerance analysis to demonstrate the possibility of large-scale and low-cost processing. The simulation results indicated that our proposed filter attained four spectral channels in the spectral range of 8–14 μm with peak energy transmittance up to about 60%, and wide tolerances as well as polarization-insensitive characteristics. Our proposed long-wave infrared filters can provide efficient and low-cost solutions for lightweight multi-spectral devices and all-weather detection.

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.