Laser action in ZnO nanoneedles selectively grown on silicon and plastic substrates

Shu Ping Lau, H. Y. Yang, Siu Fung Yu, H. D. Li, M. Tanemura, T. Okita, H. Hatano, H. H. Hng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

64 Citations (Scopus)


An ion-beam technique has been employed to fabricate nanoscale needlelike structures in ZnO thin films on silicon and plastic substrates at room temperature. The ZnO nanoneedles showed a single-crystalline wurtzite structure, the stem of which was around 100 nm in diameter. The sharp tips of the nanoneedles exhibited an apex angle of 20° as measured by transmission electron microscopy. Room-temperature ultraviolet random lasing action was observed in the ZnO nanoneedle arrays under 355 nm optical excitation.
Original languageEnglish
Article number013104
JournalApplied Physics Letters
Issue number1
Publication statusPublished - 4 Jul 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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