Quasi one-dimensional light beam generated by a graded-index microsphere.

  title={Quasi one-dimensional light beam generated by a graded-index microsphere.},
  author={Soon-Cheol Kong and Allen Taflove and Vadim Backman},
  journal={Optics express},
  volume={17 5},
An optically illuminated micron-scale dielectric sphere can generate a photonic nanojet - a nonresonant propagating beam phenomenon of high amplitude, narrow waist, and substantial sensitivity to the presence of nanometer-scale particles and geometric features located within the beam. Via three-dimensional finite-difference time-domain computational electrodynamics modeling of illuminated graded-index microspheres, we have found that the useful length of a photonic nanojet can be increased by… CONTINUE READING

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