High- Q Supercavity Modes in Subwavelength Dielectric Resonators

Recent progress in nanoscale optical physics is associated with the development of a new branch of nanophotonics exploring strong Mie resonances in dielectric nanoparticles with a high refractive index. The high-index resonant dielectric nanostructures form building blocks for novel photonic metadevices with low losses and advanced functionalities. However, unlike extensively studied cavities in photonic crystals, such dielectric resonators demonstrate low quality factors (Q factors). Here, we uncover a novel mechanism for achieving giant Q factors of subwavelength nanoscale resonators by realizing the regime of bound states in the continuum. In contrast to the previously suggested multilayer structures with…

• RF
  Russian Foundation for Basic Research

  Award: 16-02-00461
• MO
  Ministry of Education and Science of the Russian Federation

  Award: 3.1500.2017/4.6
• RS
  Russian Science Foundation

  Award: 17-12-01581
• AR
  Australian Research Council