Manipulation of exciton and photon lasing in a membrane-type ZnO microcavity

Ying Yu Lai, Jee Wei Chen, Tsu Chi Chang, Yu Hsun Chou, Tien Chang Lu

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9 Citations (Scopus)


We report on the fabrication and characterization of a membrane-type ZnO microcavity (MC). The ZnO membrane was cut from a single crystalline ZnO substrate by using focused ion beam milling, and was then placed onto a SiO2 substrate by using glass microtweezers. Through changing the pumping regime, manipulation of P-band exciton lasing and whispering-gallery mode (WGM) photon lasing could be easily achieved. P-band exciton lasing was observed only when the pumping laser was focused at the center of the ZnO MC with a small pumping size because of the innate ring-shaped WGM distribution. Furthermore, the lasing threshold of the ZnO MC could be reduced to an order lower by using a larger pumping spot because of the more favorable spatial overlap between the optical gain and WGM.

Original languageEnglish
Article number131106
JournalApplied Physics Letters
Issue number13
Publication statusPublished - 2015 Mar 30

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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