从金纳米薄膜上的凸起测量暗场光子散射状态

IF 2 4区物理与天体物理 Q3 OPTICS

Journal of Optics Pub Date : 2024-09-16 DOI:10.1088/2040-8986/ad7513

Abbas Nasir, Hongze Wang, Xuefeng Liu and Jichuan Xiong

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引用次数: 0

摘要

暗场和明场（BF）成像技术探索了涂覆在二氧化硅基底上的金纳米薄膜上的凸起所产生的等离子现象。该研究采用暗场（DF）偏振间接显微成像技术来研究散射光子状态，并揭示了具有明显多极特征的空间分布特性，这与 BF 成像配置中观察到的特征形成了鲜明对比。为了进一步了解这种行为并考虑实验装置的影响，我们利用有限差分时域法进行了计算模拟。观察到的多极散射特征随 DF 照明入射角度的变化而变化，这表明不同角度入射的光束激发的等离子效应是不同的。

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Dark field photon scattering state measurements from bumps on a gold nanofilm

A dark and bright field (BF) imaging technique explored plasmonic phenomena arising from bumps on a gold nanofilm coated on a silica substrate. The study employs dark field (DF) polarization indirect microscopic imaging to investigate the scattering photon state and reveal the spatial distribution characteristics with distinct multipolar features, contrasting with those observed in the BF imaging configuration. Computational simulations utilizing the finite-difference time-domain method were conducted to understand this behaviour further and consider the experimental setup’s impact. The observations of varying multipolar scattering features with changes in the incident angle of the DF illumination suggest that the excitation of plasmonic effects differs for light beams incident at different angles.

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来源期刊

Journal of Optics OPTICS-

CiteScore

4.50

自引率

4.80%

发文量

237

审稿时长

1.9 months

期刊介绍： Journal of Optics publishes new experimental and theoretical research across all areas of pure and applied optics, both modern and classical. Research areas are categorised as: Nanophotonics and plasmonics Metamaterials and structured photonic materials Quantum photonics Biophotonics Light-matter interactions Nonlinear and ultrafast optics Propagation, diffraction and scattering Optical communication Integrated optics Photovoltaics and energy harvesting We discourage incremental advances, purely numerical simulations without any validation, or research without a strong optics advance, e.g. computer algorithms applied to optical and imaging processes, equipment designs or material fabrication.