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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 25 — Dec. 16, 2013
  • pp: 31615–31622

High quality factor GaAs-based photonic crystal microcavities by epitaxial re-growth

Ivan Prieto, Jesús Herranz, Lukasz Wewior, Yolanda González, Benito Alén, Luisa González, and Pablo A. Postigo  »View Author Affiliations

Optics Express, Vol. 21, Issue 25, pp. 31615-31622 (2013)

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We investigate L7 photonic crystal microcavities (PCMs) fabricated by epitaxial re-growth of GaAs pre-patterned substrates, containing InAs quantum dots. The resulting PCMs show hexagonal shaped nano-holes due to the development of preferential crystallographic facets during the re-growth step. Through a careful control of the fabrication processes, we demonstrate that the photonic modes are preserved throughout the process. The quality factor (Q) of the photonic modes in the re-grown PCMs strongly depends on the relative orientation between photonic lattice and crystallographic directions. The optical modes of the re-grown PCMs preserve the linear polarization and, for the most favorable orientation, a 36% of the Q measured in PCMs fabricated by the conventional procedure is observed, exhibiting values up to ~6000. The results aim to the future integration of site-controlled QDs with high-Q PCMs for quantum photonics and quantum integrated circuits.

© 2013 Optical Society of America

OCIS Codes
(220.0220) Optical design and fabrication : Optical design and fabrication
(230.5590) Optical devices : Quantum-well, -wire and -dot devices
(250.5230) Optoelectronics : Photoluminescence

ToC Category:
Photonic Crystals

Original Manuscript: September 9, 2013
Revised Manuscript: November 7, 2013
Manuscript Accepted: November 11, 2013
Published: December 13, 2013

Ivan Prieto, Jesús Herranz, Lukasz Wewior, Yolanda González, Benito Alén, Luisa González, and Pablo A. Postigo, "High quality factor GaAs-based photonic crystal microcavities by epitaxial re-growth," Opt. Express 21, 31615-31622 (2013)

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