Cylindrical resonator utilizing a curved resonant grating as a cavity wall

Yasuo Ohtera, Shohei Iijima, Hirohito Yamada

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


A thin-film grating on a curved substrate functions as a highly reflective and wavelength sensitive mirror for a diverging wave that has the same curvature as the substrate. In this paper we propose a cylindrical cavity surrounded by a curved resonant grating wall, and describe its resonance characteristics. Through finite-difference time-domain (FDTD) simulation we have clarified that this type of cavity supports two resonance modes: one is confined by Fresnel reflection and the other by resonance reflection of the wall. We have also demonstrated that the latter mode exhibits a Q factor several orders of magnitude higher than that of the former mode.

Original languageEnglish
Pages (from-to)101-113
Number of pages13
Issue number1
Publication statusPublished - 2012


  • Circular cavity
  • Cylindrical cavity
  • Guided-mode resonance
  • Resonant grating


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