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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 13 — Jul. 1, 2010
  • pp: 2182–2184

Mitigation of Si nanocrystal free carrier absorption loss at 1.5 μm in a concentric microdisk structure

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


Optics Letters, Vol. 35, Issue 13, pp. 2182-2184 (2010)
http://dx.doi.org/10.1364/OL.35.002182


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Abstract

We study the mitigation of Si nanocrystal (Si-nc) free carrier absorption (FCA) loss at telecom wavelengths in a concentric microdisk design. The concentric microdisk design relies on using the Si-nc emission as an optical pump for the surrounding Er-based lasing media without subjecting the lasing mode to the FCA loss present in the Si-ncs. We analyze the FCA loss as a function of overhang width in this design and show that for large enough overhang width the FCA loss is negligible. We also compute the FCA cross section from the FCA loss and number of excited Si-ncs, modeled by a four-level system, and show σ FCA = 1.08 ± 2.3 × 10 17 cm 2 , which is in good agreement with reported cross sections for similar films.

© 2010 Optical Society of America

OCIS Codes
(220.4000) Optical design and fabrication : Microstructure fabrication
(230.5590) Optical devices : Quantum-well, -wire and -dot devices
(220.4241) Optical design and fabrication : Nanostructure fabrication
(070.5753) Fourier optics and signal processing : Resonators

ToC Category:
Optical Devices

History
Original Manuscript: April 16, 2010
Revised Manuscript: June 1, 2010
Manuscript Accepted: June 3, 2010
Published: June 22, 2010

Citation
Elton Marchena, Brandon Redding, Tim Creazzo, and Dennis W. Prather, "Mitigation of Si nanocrystal free carrier absorption loss at 1.5 μm in a concentric microdisk structure," Opt. Lett. 35, 2182-2184 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-13-2182


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