Continuous alloy-composition spatial grading and superbroad wavelength-tunable nanowire lasers on a single chip

Anlian Pan, Weichang Zhou, Eunice S P Leong, Ruibin Liu, Alan H. Chin, Bingsuo Zou, Cun-Zheng Ning

Research output: Contribution to journalArticle

169 Scopus citations


By controlling local substrate temperature in a chemical vapor deposition system, we have successfully achieved spatial composition grading covering the complete composition range of ternary alloy CdSSe nanowires on a single substrate of 1.2 cm in length. Spatial photoluminescence scan along the substrate length shows peak wavelength changes continuously from ∼500 to ∼700 nm. Furthermore, we show that under strong optical pumping, every spot along the substrate length displays lasing behavior. Thus our nanowire chip provides a spatially continuously tunable laser with a superbroad wavelength tuning range, unmatched by any other available semiconductor-based technology.

Original languageEnglish (US)
Pages (from-to)784-788
Number of pages5
JournalNano Letters
Issue number2
StatePublished - Feb 11 2009


ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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