High-quality grating-coupled surface plasmon resonances in silver and gold bumps arrays fabricated in thin metallic films using the third harmonic of femtosecond laser

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-07-22 DOI:10.1016/j.apsusc.2025.164127

Rodrigas Liudvinavičius, Kernius Vilkevičius, Evaldas Stankevičius

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Abstract

Grating-coupled surface plasmon resonances, generated by periodic metal nanostructure arrays, exhibit strong optical confinement and enhanced field localization. Due to their unique properties, these resonances are interesting in biosensing, nanolasing, surface-enhanced spectroscopy, and nonlinear optics. Here, large-scale bumps arrays fabricated with a wavelength-scale period in silver and gold films by using a direct laser writing technique are presented. These structures exhibit strong plasmonic resonances in Vis and NIR ranges whose quality depends on the coupling conditions and can exceed 100. The highest quality factor of resonances is achieved with p-polarized light. The measured dependence of grating-coupled surface plasmon resonance wavelengths of gold and silver bumps arrays on the incident angle is in good agreement with theoretical considerations. The demonstrated laser-based method shows significant technological progress in the fabrication of gold and silver nanostructures arrays supporting high-quality surface plasmon resonances.

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利用飞秒激光的三次谐波在金属薄膜中制造出高质量的光栅耦合表面等离子体共振

由周期性金属纳米结构阵列产生的光栅耦合表面等离子体共振表现出强光约束和增强的场局域化。由于其独特的性质，这些共振在生物传感、纳米发光、表面增强光谱学和非线性光学中很有趣。本文介绍了利用激光直接写入技术在银和金薄膜上制备具有波长尺度周期的大规模凸点阵列。这些结构在可见光和近红外光谱范围内表现出强烈的等离子共振，其质量取决于耦合条件，可以超过100。共振的最高质量因子是用p偏振光实现的。测量得到的金、银凸起阵列的光栅耦合表面等离子体共振波长与入射角的关系与理论计算结果吻合较好。所演示的基于激光的方法显示了在制造支持高质量表面等离子体共振的金和银纳米结构阵列方面的重大技术进步。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.