Concentric Circular Grating Generated by the Patterning Trapping of Nanoparticles in an Optofluidic Chip

@article{Dai2016ConcentricCG,
  title={Concentric Circular Grating Generated by the Patterning Trapping of Nanoparticles in an Optofluidic Chip},
  author={Hailang Dai and Zhuang-qi Cao and Yuxing Wang and Honggen Li and Ming-huang Sang and Wen Yuan and Fan Chen and Xianfeng Chen},
  journal={Scientific Reports},
  year={2016},
  volume={6}
}
Due to the field enhancement effect of the hollow-core metal-cladded optical waveguide chip, massive nanoparticles in a solvent are effectively trapped via exciting ultrahigh order modes. A concentric ring structure of the trapped nanoparticles is obtained since the excited modes are omnidirectional at small incident angle. During the process of solvent evaporation, the nanoparticles remain well trapped since the excitation condition of the optical modes is still valid, and a concentric… 
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