Tunable localization of light using nested invisible metasurface cavities

Francisco S. Cuesta*, Sergei Kosulnikov, Viktar S. Asadchy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


An invisible cavity is an open resonant device that confines a localized field without producing any scattering outside of the device volume. By exploiting the scatter-less property of such device, it is possible to nest two invisible cavities, as the outer cavity would simply not notice the presence of the inner one, regardless of their relative position. As a result, the position of the inner cavity becomes a means to easily control the field localized inside the cavity and its quality factor. In this paper, we discuss the properties of nested invisible cavities as a simple method to achieve stronger localized fields and high tunable quality factor. Furthermore, we show that in optics, these cavities can be implemented using nanodisk-based dielectric metasurfaces that operate near their electric resonances.

Original languageEnglish
Pages (from-to)1083-1089
Number of pages7
Issue number6
StatePublished - 2 Mar 2023
Externally publishedYes


  • cavity
  • field localization
  • metasurface
  • quality factor
  • tunable


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