Gold substrate-induced single-mode lasing of GaN nanowires

Huiwen Xu, Jeremy B. Wright, Antonio Hurtado, Qiming Li, Ting Shan Luk, Jeffrey J. Figiel, Karen Cross, Ganesh Balakrishnan, Luke F. Lester, Igal Brener, George T. Wang

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


We demonstrate a method for mode-selection by coupling a GaN nanowire laser to an underlying gold substrate. Multimode lasing of GaN nanowires is converted to single-mode behavior following placement onto a gold film. A mode-dependent loss is generated by the absorbing substrate to suppress multiple transverse-mode operation with a concomitant increase in lasing threshold of only ∼13. This method provides greater flexibility in realizing practical single-mode nanowire lasers and offers insight into the design of metal-contacted nanoscale optoelectronics.

Original languageEnglish
Article number221114
Number of pages4
JournalApplied Physics Letters
Issue number22
Publication statusPublished - 26 Nov 2012


  • nanowires
  • gold
  • laser resonators


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