Ultraviolet lasing from ZnO single crystal at room temperature

Wang Hua Xiang*, Gui Zhong Zhang, Yi Sun, Gang Wang, John B. Ketterson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We experimentally studied ultraviolet photoluminescence (PL) from ZnO (0001) single crystal at room temperature. The PL spectra taken from the sample edge show spectral width narrowing; lifetime shortening (100ps) and super linear intensity increase with pumping power, while the PL spectra taken from the sample surface only show broad spontaneous emission with a much longer lifetime (> 5 ns). These findings suggest that stimulated emission and lasing were only achieved at edges of the ZnO single crystal. Scanning-electron-microscopic images show a smooth sample surface morphology and a rougher morphology at the single crystal edge. Electron-hole plasma enhancement of gain may be attributed to the lasing effect observed from the sample edge.

Original languageEnglish (US)
Pages (from-to)296-297
Number of pages2
JournalChinese Physics Letters
Volume20
Issue number2
DOIs
StatePublished - Feb 2003

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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