3:00 PM - 3:15 PM
▲ [9p-Z16-7] Stable Particle Clusters Trapped and Assembled Using a Plasmonic Nanotweezer Integrated on a Silicon Waveguide
Keywords:hybrid photonic-plasmonic devices, plasmonic nanotweezers, optical assembly
Based on experimental observations and motion tracking analysis, we investigate the geometry, orientation, and stability of the self-organized bead clusters. Surprisingly, the orientation and stability of the clusters is found to greatly vary depending on the number and the configuration of the trapped beads. By analyzing of the trapped bead’s motion, we show that vacancy-free cluster topologies are the most stables. Our results evidence that the relief created by the waveguide at the surface of the sample and the resulting electrostatic potential barriers at the edges of the waveguide play a key role in the enhancement of the clusters’ stability.
Based on the observation and analysis of optically assembled clusters of polystyrene beads, our results show how stable vacancy-free clusters can be formed through the joint action of optical and electrostatic forces. This work paves the way for further development of plasmonic nanotweezers following a multiphysics approach.
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