Effect of rotation on quality factor of single-mode optical resonances in round-cornered square-shaped resonators

Prabodh Panindre, N. S.Susan Mousavi, Sunil Kumar

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Recently, non-circular microresonators have been studied mainly due to their ability to provide long interaction length and ease the air-gap spacing tolerance. The use of rectangular, square-shaped, and/ or polygonal optical microresonators with sharp corners can be limited by severe energy loss at the corners. By incorporating optimum fillet (rounding of corners) design at sharp corners of such optical microresonators optical loss can be eliminated at sharp corners. This results in significantly increasing the quality factor of the round-cornered square-shaped microresonators in comparison to the conventional circular-ring resonator systems. The enhanced quality factor makes the microresonator a promising system that can be used in advanced measurement and detection applications. The two dimensional finite element analysis of the electromagnetic frequency presented in this study quantifies the effect of rotation of round-cornered square-shaped resonators about the coupling region on the quality factor of single-mode resonances in a add-drop configuration system. It is found that the quality factor of these resonators steadily increases with the rotation (0-45° angle) of resonator about the coupling point.

Original languageEnglish (US)
Title of host publicationPhysics and Simulation of Optoelectronic Devices XXVI
EditorsMarek Osinski, Yasuhiko Arakawa, Bernd Witzigmann
ISBN (Electronic)9781510615373
StatePublished - 2018
EventPhysics and Simulation of Optoelectronic Devices XXVI 2018 - San Francisco, United States
Duration: Jan 29 2018Feb 1 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherPhysics and Simulation of Optoelectronic Devices XXVI 2018
Country/TerritoryUnited States
CitySan Francisco


  • Label-Free Sensing
  • Optical Resonances
  • Quality Factor
  • Single-Mode Fiber Optic Resonator

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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