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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 23 — Nov. 9, 2009
  • pp: 20998–21006

Ultra-high quality-factor resonators with perfect azimuthal Modal-Symmetry

Nikolaj Moll, Thilo Stöferle, Sophie Schönenberger, and Rainer F. Mahrt  »View Author Affiliations

Optics Express, Vol. 17, Issue 23, pp. 20998-21006 (2009)

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We study circular grating resonators (CGRs) which are formed by a central defect surrounded by concentric rings composing a grating and which display perfect azimuthal modal-symmetry. Because of their radial symmetry they exhibit a complete band gap for a minimal index contrast. However, as is the case for all 2D resonators their quality factors are limited by vertical losses. To reduce the vertical losses we introduce a chirp of the grating period by reducing it towards the central defect. The chirped CGRs exhibit drastically improved quality factors of up to tens of millions with a modal volume of a few cubic wavelengths.

© 2009 Optical Society of America

OCIS Codes
(130.0130) Integrated optics : Integrated optics
(230.5750) Optical devices : Resonators

ToC Category:
Integrated Optics

Original Manuscript: September 2, 2009
Revised Manuscript: October 28, 2009
Manuscript Accepted: October 28, 2009
Published: November 3, 2009

Nikolaj Moll, Thilo Stöferle, Sophie Schönenberger, and Rainer F. Mahrt, "Ultra-high quality-factor resonators with perfect azimuthal modal-symmetry," Opt. Express 17, 20998-21006 (2009)

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