Enhancement of ultraviolet lasing from Ag-coated highly disordered ZnO films by surface-plasmon resonance

A. P. Abiyasa, Siu Fung Yu, Shu Ping Lau, Eunice S.P. Leong, H. Y. Yang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

93 Citations (Scopus)

Abstract

Large improvement in random lasing action at ultraviolet wavelength has been achieved from highly disordered ZnO films with Ag coating. The lasing threshold can be reduced by two times and slope efficiency can be increased by 5.5 times. The improvement is due to the presence of Ag coating, which enhances the surface coupling of lasing emission from the ZnO films by surface-plasmon resonance and reduces the scattering loss experienced by the random cavity modes. Furthermore, the enhancement of lasing efficiency is dependent on the Ag coating's surface roughness, which can be controlled through the surface morphology of ZnO films.
Original languageEnglish
Article number231106
JournalApplied Physics Letters
Volume90
Issue number23
DOIs
Publication statusPublished - 27 Jun 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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