Optical microscopy via spectral modifications of a nanoantenna.

  title={Optical microscopy via spectral modifications of a nanoantenna.},
  author={Thomas Kalkbrenner and Ulf H{\aa}kanson and Achim Sch{\"a}dle and Sven Burger and Carsten Henkel and Vahid Sandoghdar},
  journal={Physical review letters},
  volume={95 20},
The existing optical microscopes form an image by collecting photons emitted from an object. Here we report on the experimental realization of microscopy without the need for direct optical communication with the sample. To achieve this, we have scanned a single gold nanoparticle acting as a nanoantenna in the near field of a sample and have studied the modification of its intrinsic radiative properties by monitoring its plasmon spectrum. 

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