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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 9 — May. 1, 2009
  • pp: 1384–1386

Coupling Si nanocrystal microdisk emission to whispering-gallery modes in a concentric SiO 2 ring

Brandon Redding, Tim Creazzo, Elton Marchena, Shouyuan Shi, and Dennis W. Prather  »View Author Affiliations

Optics Letters, Vol. 34, Issue 9, pp. 1384-1386 (2009)

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We present a concentric microdisk design in which luminescence from an inner disk of Si nanocrystals (Si-ncs) contributes to resonant modes in an outer ring of SiO 2 . Photoluminescence from fabricated structures reveals the excitation of whispering-gallery modes (WGMs) with quality factors as high as 2850, limited by the spectral resolution of our spectrometer. Two-dimensional finite-difference time-domain simulations provide insight into the WGM properties and the role of disk and ring geometry. The presented concentric disk structure provides a means to use the efficient visible luminescence of Si-ncs as an optical pump for an extrinsic lasing material such as Er : SiO 2 .

© 2009 Optical Society of America

OCIS Codes
(140.4780) Lasers and laser optics : Optical resonators
(230.3990) Optical devices : Micro-optical devices
(230.5590) Optical devices : Quantum-well, -wire and -dot devices
(230.5750) Optical devices : Resonators

ToC Category:
Optical Devices

Original Manuscript: February 26, 2009
Revised Manuscript: March 23, 2009
Manuscript Accepted: March 24, 2009
Published: April 23, 2009

Brandon Redding, Tim Creazzo, Elton Marchena, Shouyuan Shi, and Dennis W. Prather, "Coupling Si nanocrystal microdisk emission to whispering-gallery modes in a concentric SiO2 ring," Opt. Lett. 34, 1384-1386 (2009)

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