Polarization characteristics of ZnO rib waveguide random lasers

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

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Ultraviolet ZnO rib waveguide random lasers with stripe width ranging from 1.7 to 6.5 μm have been fabricated. It is found that the ZnO random lasers demonstrate strong TE lasing emission especially for rib waveguide with a narrower width. Rate equation analysis has shown that the dominant TE lasing emission is due to the corresponding large confinement factor and scattering strength inside the random media with rib waveguide. In addition, Fourier transform studies of the lasing spectra show that the width of rib waveguide constrains the formation of closed-loop paths of lights and, hence, reduces the number of lasing peaks.
Original languageEnglish
Article number091116
JournalApplied Physics Letters
Issue number9
Publication statusPublished - 27 Feb 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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