High-temperature random lasing in ZnO nanoneedles

H. Y. Yang, Shu Ping Lau, Siu Fung Yu, A. P. Abiyasa, M. Tanemura, T. Okita, H. Hatano

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We report the high-temperature ultraviolet random laser action in ZnO nanoneedles. The characteristic temperature of the ZnO nanoneedle lasers was derived to be 138 K in the temperature range from 300 to 615 K. The cavity length of the random lasers as a function of temperature was determined by Fourier transform spectroscopy. The cavity length decreased with an increase in temperature from ~14 μm at 300 K to ~2 μm at 550 K. The optical gain of the ZnO nanoneedle lasers at high temperature is attributed to a self-compensation mechanism in the cavity length.
Original languageEnglish
Article number011103
JournalApplied Physics Letters
Issue number1
Publication statusPublished - 14 Jul 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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