Evanescent field trapping of nanoparticles using nanostructured ultrathin optical fibers.

  title={Evanescent field trapping of nanoparticles using nanostructured ultrathin optical fibers.},
  author={Mark Daly and Viet Giang Truong and S{\'i}le Nic Chormaic},
  journal={Optics express},
  volume={24 13},
While conventional optical trapping techniques can trap objects with submicron dimensions, the underlying limits imposed by the diffraction of light generally restrict their use to larger or higher refractive index particles. As the index and diameter decrease, the trapping difficulty rapidly increases; hence, the power requirements for stable trapping become so large as to quickly denature the trapped objects in such diffraction-limited systems. Here, we present an evanescent field-based… 

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