Effect of rounding corners on optical resonances in single-mode sharp-cornered microresonators

Prabodh Panindre, Sunil Kumar

Research output: Contribution to journalArticle


The use of microresonators with sharp corners (rectangular and square-shaped) can be limited by severe energy loss at the corners. A 2D numerical study is conducted to investigate and analyze the effect of incorporating fillet (rounding of corners) design at sharp corners of such single-mode optical microresonators. The effect on quality factor, free spectral range, and energy loss for the coupled microresonator-waveguide system in the add-drop configuration for varying values of fillet radii are quantified. It is shown that the selection of an optimum radius of the curvature of the fillet for sharp-cornered microresonators provides a higher quality factor than that of the conventional circular resonators.

Original languageEnglish (US)
Pages (from-to)878-881
Number of pages4
JournalOptics Letters
Issue number5
StatePublished - Mar 1 2016


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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