Measuring the mode volume of plasmonic nanocavities using coupled optical emitters

  title={Measuring the mode volume of plasmonic nanocavities using coupled optical emitters},
  author={Kasey J. Russell and Kitty Y. M. Yeung and Evelyn L. Hu},
  journal={Physical Review B},
Metallic optical systems can confine light to deep sub-wavelength dimensions, but verifying the level of confinement at these length scales typically requires specialized techniques and equipment for probing the near-field of the structure. We experimentally measured the confinement of a metal-based optical cavity by using the cavity modes themselves as a sensitive probe of the cavity characteristics. By perturbing the cavity modes with conformal dielectric layers of sub-nm thickness using… 

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