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arXiv · 2503.08112

In-situ dynamic spatial reconfiguration of nanoplasmonics using photothermal-shock tweezers

Runlin Zhu·Zhaoqi Gu·Tianci Shen·Yifei Liu·Zhangxing Shi·Shuangyi Linghu·Fuxing Gu
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Abstract

Dynamic reconfiguration is crucial for nanoplasmonic structures to achieve diversified functions and optimize performances; however, the dynamic reconfiguration of spatial arrangements remains a formidable technological challenge. Here, we showcase in-situ dynamic spatial reconfiguration of plasmonic nanowire devices and circuits on dry solid substrates, by harnessing a photothermal-shock tweezers platform. Owing to its versatility, nanoscale precision, real-time operation, and large external output force, the multimodal platform enables dexterous fine-tuning of positions, overlap lengths, and coupling distances and orientations of discrete components in situ. Spatial position-dependent optical properties that have not been reported before or are challenging to achieve through traditional micro/nanomanipulation are easily tuned and observed, such as the intensity evolution of axial photon-plasmon coupling from near field to far field, and the resonant mode evolution of photonic cavity-plasmonic cavity coupling from weak to strong. We also employ the nanorobotic probe-based operation mode to optimize the side-mode suppression ratios of single-mode lasers and the intensity splitting ratios of 3-dB couplers. Our results are general and applicable to materials of almost any size, structure, and material type, as well as other narrow or curved micro/nano-waveguide surfaces, which opens new avenues for reconfigurable nanoplasmonic structures with dynamically tunable spatial features.

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Runlin Zhu, Zhaoqi Gu, Tianci Shen, Yifei Liu, Zhangxing Shi, Shuangyi Linghu, Fuxing Gu. 2025-03-11. In-situ dynamic spatial reconfiguration of nanoplasmonics using photothermal-shock tweezers. https://arxiv.org/abs/2503.08112

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