Low-temperature fabrication and random laser action of doped zinc oxide nanoneedles

Masaki Tanemura, H. Hatano, M. Kudo, N. Ide, Y. Fujimoto, L. Miao, H. Y. Yang, S. P. Lau, S. F. Yu, J. Kato

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Zinc oxide (ZnO) thin films grown on SiO2-coated Si substrates by filtered cathodic vacuum arc (FCVA) at 200 °C was irradiated with Ar+ ions with a simultaneous supply of Fe atoms or with N2+ ions (without Fe) at room temperature to fabricate Fe- or N-doped ZnO nanoneedles, respectively. The morphological structure of the doped nanoneedles was almost identical with that of non-doped nanoneedles. The detailed analyses by energy dispersive X-ray spectroscopy combined with transmission electron microscope revealed that Fe was doped at and beneath the surface of the nanoneedles as well as at the needle tip. Random lasing was observed for both Fe- and N-doped ZnO nanoneedles thus fabricated, and the lasing peaks detected were redshifted compared with those attained for non-doped ZnO nanoneedles. Since the lasing wavelength, and hence the bandgap, was readily tunable, the combination of FCVA and ion-irradiation methods was concluded to be quite promising to fabricate 1D nanostructures for optoelectronics applications at low temperatures.

Original languageEnglish
Pages (from-to)4459-4464
Number of pages6
JournalSurface Science
Volume601
Issue number18
DOIs
Publication statusPublished - 2007 Sep 15
Externally publishedYes

Keywords

  • Ion beam
  • Laser
  • Nanostructure
  • ZnO

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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  • Cite this

    Tanemura, M., Hatano, H., Kudo, M., Ide, N., Fujimoto, Y., Miao, L., Yang, H. Y., Lau, S. P., Yu, S. F., & Kato, J. (2007). Low-temperature fabrication and random laser action of doped zinc oxide nanoneedles. Surface Science, 601(18), 4459-4464. https://doi.org/10.1016/j.susc.2007.04.129