Unveiling the Coupling of Single Metallic Nanoparticles to Whispering-Gallery Microcavities.

  title={Unveiling the Coupling of Single Metallic Nanoparticles to Whispering-Gallery Microcavities.},
  author={Yves Auad and Cyrille Hamon and Marcel Tenc{\'e} and Hugo Lourenço-Martins and Vahagn Mkhitaryan and Odile St{\'e}phan and F. Javier Garc{\'i}a de abajo and Luiz Henrique Galv{\~a}o Tizei and Mathieu Kociak},
  journal={Nano letters},
Whispering-gallery mode resonators host multiple trapped narrow-band circulating optical resonances that find applications in quantum electrodynamics, optomechanics, and sensing. However, the spherical symmetry and low field leakage of dielectric microspheres make it difficult to probe their high-quality optical modes using far-field radiation. Even so, local field enhancement from metallic nanoparticles (MNPs) coupled to the resonators can interface the optical far field and the bounded cavity… 
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