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Updated: Mar 7, 2026

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Achieving High Spatial Resolution Surface Plasmon Resonance Microscopy with Image Reconstruction.

Hui Yu1,2, Xiaonan Shan2, Shaopeng Wang2

  • 1State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China.

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Summary

We developed a novel deconvolution method to enhance the spatial resolution of surface plasmon resonance microscopy (SPRM). This technique improves longitudinal resolution without compromising sensitivity or temporal resolution, enabling near-diffraction-limit imaging.

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Area of Science:

  • Biomedical Imaging
  • Nanotechnology
  • Optics

Background:

  • Surface plasmon resonance microscopy (SPRM) is vital for analyzing molecular interactions and biomedical imaging.
  • Current SPRM techniques face limitations in spatial resolution, particularly in the longitudinal direction, due to plasmonic wave properties.
  • Existing methods to improve resolution often reduce sensitivity or temporal performance.

Purpose of the Study:

  • To introduce a new method for enhancing the spatial resolution of SPRM.
  • To overcome the longitudinal resolution limitations of SPRM without sacrificing other key performance metrics.
  • To demonstrate the effectiveness of the proposed method in high-resolution imaging applications.

Main Methods:

  • Developed a novel deconvolution technique based on complex field analysis.
  • The method integrates seamlessly with existing SPRM setups, requiring no additional optical hardware.
  • Applied the deconvolution method to image nanoparticles with high precision.

Main Results:

  • Achieved significant improvement in the longitudinal spatial resolution of SPRM.
  • The method successfully imaged nanoparticles with resolution approaching the diffraction limit.
  • Maintained high sensitivity and temporal resolution, unlike previous approaches.

Conclusions:

  • The proposed deconvolution method offers a powerful, non-invasive way to enhance SPRM spatial resolution.
  • This advancement opens new possibilities for detailed nanoscale imaging and kinetic analysis in biological systems.
  • The technique provides near-diffraction-limit resolution in both longitudinal and transverse directions.