Resonant optical cavity used as a nonradiating source for optical near-field microscopy.

@article{Salvi1999ResonantOC,
  title={Resonant optical cavity used as a nonradiating source for optical near-field microscopy.},
  author={J{\'e}r{\^o}me Salvi and Daniel Courjon},
  journal={Optics letters},
  year={1999},
  volume={24 24},
  pages={1811-3}
}
Nonradiating sources are emitting devices whose geometry prohibits electromagnetic emission. First, we show that a ring cavity can be substituted for the usual prism in scanning tunneling optical microscopy. Second, we find that near-field detection is an ideal way to explore the behavior of such nonradiating sources.