標題: Manipulation of exciton and photon lasing in a membrane-type ZnO microcavity
作者: Lai, Ying-Yu
Chen, Jee-Wei
Chang, Tsu-Chi
Chou, Yu-Hsun
Lu, Tien-Chang
照明與能源光電研究所
光電工程學系
Institute of Lighting and Energy Photonics
Department of Photonics
公開日期: 30-Mar-2015
摘要: 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. (C) 2015 AIP Publishing LLC.
URI: http://dx.doi.org/10.1063/1.4916920
http://hdl.handle.net/11536/124708
ISSN: 0003-6951
DOI: 10.1063/1.4916920
期刊: APPLIED PHYSICS LETTERS
Volume: 106
Issue: 13
Appears in Collections:Articles