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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 15 — Aug. 1, 2012
  • pp: 3195–3197

A 1.16-μm-radius disk cavity in a sunflower-type circular photonic crystal with ultrahigh quality factor

Xufeng Zhang, Xiankai Sun, and Hong X. Tang  »View Author Affiliations

Optics Letters, Vol. 37, Issue 15, pp. 3195-3197 (2012)

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We present a 1.16-μm-radius disk cavity with ultrahigh quality (Q) factor by embedding the disk into a sunflower-type circular photonic crystal (CPC). The bandgap of the CPC reduces the bending loss of the whispering-gallery mode of the disk, leading to a simulated Q of 107, at least an order of magnitude higher than a bare disk of the same size. The design is experimentally verified with a record high loaded Q of 7.4×105 measured from an optimized device fabricated on a silicon-on-insulator substrate.

© 2012 Optical Society of America

OCIS Codes
(230.5750) Optical devices : Resonators
(220.4241) Optical design and fabrication : Nanostructure fabrication
(230.5298) Optical devices : Photonic crystals

ToC Category:
Optical Devices

Original Manuscript: May 4, 2012
Revised Manuscript: May 31, 2012
Manuscript Accepted: June 6, 2012
Published: July 26, 2012

Xufeng Zhang, Xiankai Sun, and Hong X. Tang, "A 1.16-μm-radius disk cavity in a sunflower-type circular photonic crystal with ultrahigh quality factor," Opt. Lett. 37, 3195-3197 (2012)

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