Observation of lasing emission from carbon nanodots in organic solvents

W. F. Zhang, H. Zhu, Siu Fung Yu, H. Y. Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

117 Citations (Scopus)

Abstract

Lasing is observed from carbon nanodots (C-dots) dispersed into a layer of poly(ethylene glycol) coated on the surface of optical fibers under 266 nm optical excitation. This is due to the enhancement of photoluminescence intensity via the esterification of carboxylic groups of the C-dots, and the formation of high-Q cylindrical microcavities to support second-type whispering gallery modes.
Original languageEnglish
Pages (from-to)2263-2267
Number of pages5
JournalAdvanced Materials
Volume24
Issue number17
DOIs
Publication statusPublished - 2 May 2012

Keywords

  • carbon nanodots
  • cylindrical microcavities
  • lasing emission
  • photoluminescence
  • whispering gallery modes

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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