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

AuthorsPrieto-González, Iván ; Herranz Zamorano, Jesús ; Wewior, Lukasz Jakub ; González Díez, Yolanda ; Alén, Benito ; González Sotos, Luisa ; Postigo, Pablo Aitor
Issue Date2013
PublisherOptical Society of America
CitationOptics Express 21(25): 31615-31622 (2013)
AbstractWe 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.
Publisher version (URL)http://dx.doi.org/10.1364/OE.21.031615
Identifiersissn: 1094-4087
Appears in Collections:(IMN-CNM) Artículos
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