Ultraviolet lasing phenomenon of zinc oxide hexagonal microtubes

Clement Yuen, Siu Fung Yu, Xiao W. Sun, Chun X. Xu, Eunice S.P. Leong, Shu Ping Lau, Chung K. Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)

Abstract

Prismatic zinc oxide (ZnO) hexagonal microtubes have been fabricated on silicon substrate using vapor transport. Two morphologies, bell-mouthed and uniform hexagonal microtubes, are obtained from the fabrication process. The ZnO hexagonal microtubes have demonstrated ultraviolet (∼393 nm) lasing emission under 355 nm optical excitation. It is found that the threshold pump intensity and cavity mode spacing of the microtube lasers are ∼500kW/cm 2 and ∼0.7 nm, respectively. The lasing characteristics of the microtube lasers are also investigated. It is shown that high threshold pump intensity of the microtube lasers is due to the high radiation loss arising from the hollow hexagonal structure near the prismatic facets.
Original languageEnglish
Pages (from-to)5273-5278
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number8 A
DOIs
Publication statusPublished - 1 Aug 2004
Externally publishedYes

Keywords

  • Laser resonators
  • Lasers
  • Ultraviolet emission
  • Vapor transport
  • Zinc oxide

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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