1：Experimental Design and Method Selection:

The study utilized a single Ag nanowire to create interferometric optical fields for enhancing electrodynamic interactions among nanoparticles. The methodology involved controlling laser polarization to tune interactions and near-field coupling.

2：Sample Selection and Data Sources:

Colloidal metal (Ag and Au) and dielectric (polystyrene) nanoparticles were used. The Ag nanowires were purchased from Sigma-Aldrich, and the nanoparticles were sourced from various suppliers.

3：List of Experimental Equipment and Materials:

A continuous wave Ti:Sapphire laser (Spectra-Physics 3900S), an inverted microscope (Olympus IX71), and a high NA dark-field condenser were used. The nanoparticles' motions were recorded by a COMOS camera (Point Grey Grasshopper3).

4：3). Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: The laser beam was focused to the back aperture of an objective, creating an expanded optical field on a coverslip surface. Nanoparticles were trapped near the upper glass surface of an aqueous sample cell and visualized by dark-field microscopy.

5：Data Analysis Methods:

The trajectories of the particles were obtained using TrackMate in ImageJ. The hexagonal order parameter was calculated to evaluate the perfection of the assembled structures.