Polarization control in GaN nanowire lasers

Huiwen Xu, Antonio Hurtado, Jeremy B. Wright, Changyi Li, Sheng Liu, Jeffrey J. Figiel, Ting Shan Luk, Steven R. J. Brueck, Igal Brener, Ganesh Balakrishnan, Qiming Li, George T. Wang

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Abstract

We demonstrate polarization control in optically-pumped single GaN nanowire lasers fabricated by a top-down method. By placing the GaN nanowires onto gold substrates, the naturally occurring randomly orientated elliptical polarization of nanowire lasers is converted to a linear polarization that is oriented parallel to the substrate surface. Confirmed by simulation results, this polarization control is attributed to a polarization-dependent loss induced by the gold substrate, which breaks the mode degeneracy of the nanowire and forms two orthogonally polarized modes with largely different cavity losses.

Original languageEnglish
Pages (from-to)19198-19203
Number of pages6
JournalOptics Express
Volume22
Issue number16
DOIs
Publication statusPublished - 11 Aug 2014

Keywords

  • nanostructure fabrication
  • semiconductor lasers
  • quantum well devices
  • photoluminescence

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