Sequential trapping of single nanoparticles using a gold plasmonic nanohole array

  title={Sequential trapping of single nanoparticles using a gold plasmonic nanohole array},
  author={Xue Han and Viet Giang Truong and S{\'i}le Nic Chormaic},
  journal={Photonics Research},
We have used a gold nanohole array to trap single polystyrene nanoparticles, with a mean diameter of 30 nm, into separated hot spots located at connecting nanoslot regions. A high trap stiffness of approximately 0.85  fN/(nm·mW) at a low-incident laser intensity of ∼0.51  mW/μm2 at 980 nm was obtained. The experimental results were compared to the simulated trapping force, and a reasonable match was achieved. This plasmonic array is useful for lab-on-a-chip applications and has particular… 

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