Microsphere-assisted super-resolution optical imaging of oriented silver nanowire arrays with polarized light

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-06-17 DOI:10.1016/j.optlastec.2025.113383

Farid Mahfoud , Christophe Cordier , Sebastien Marbach , Michel Tschopp , Paul Montgomery , Olivier Felix , Matthias Pauly , Manuel Flury

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Abstract

Microsphere-assisted microscopy is a label-free imaging technique capable of surpassing the diffraction limit of conventional optical microscopes. This study investigates the imaging of oriented silver nanowire (AgNW) monolayers as a function of incident light polarization using a 30 μm diameter microsphere. Two types of AgNW arrays, fabricated by a “bottom-up” technique and e-beam lithography, are analyzed. Using a home-built optical microscope, the relationship between microsphere magnification and image contrast is explored to identify the optimal position for maximum contrast. The developed optical setup demonstrates at least a twofold resolution enhancement and permits to effectively visualize the optical anisotropy of nanostructured samples by tuning the polarization of incident light. These findings highlight the potential for further improvements in microsphere-assisted microscopy to achieve superior nanoscale resolution.

Topics: Microsphere-assisted microscopy, oriented silver nanowires, polarization, resolution enhancement.

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偏振光定向银纳米线阵列的微球辅助超分辨光学成像

微球辅助显微镜是一种无标记成像技术，能够超越传统光学显微镜的衍射极限。本研究利用直径为30 μm的微球，研究了定向银纳米线（AgNW）单层的成像与入射光偏振的关系。分析了采用“自下而上”技术和电子束光刻技术制备的两种AgNW阵列。利用自制光学显微镜，探讨了微球放大倍率与图像对比度之间的关系，以确定最大对比度的最佳位置。所开发的光学装置显示了至少两倍的分辨率增强，并允许通过调整入射光的偏振有效地可视化纳米结构样品的光学各向异性。这些发现强调了进一步改进微球辅助显微镜以实现卓越纳米级分辨率的潜力。主题：微球辅助显微镜，取向银纳米线，极化，分辨率增强。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems