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Annular-Shaped Emission from Gallium Nitride Nanotube Lasers

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

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Annular-shaped lasing emission is demonstrated from gallium nitride nanotubes fabricated using a two-step top-down technique. By optically pumping, we observe a clear threshold of 1055 kW/cm2, a narrow spectral linewidth of 0.19 nm, and guided emission from the nanotubes. Lasing is also demonstrated in a liquid environment, with an approximate doubling in threshold observed. The nanotube lasers could be of interest for optical nanofluidic applications or applications benefiting from a hollow beam shape. More generally, the results indicate that cross-sectional shape control can be employed to manipulate the properties of nanolasers.
Original languageEnglish
Pages (from-to)1025-1029
Number of pages5
JournalACS Photonics
Volume2
Issue number8
DOIs
StatePublished - Aug 19 2015
Externally publishedYes

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