標題: Room temperature lasing with high group index in metal-coated GaN nanoring
作者: Wang, Yow-Gwo
Chang, Shu-Wei
Chen, Cheng-Chang
Chiu, Ching-Hsueh
Kuo, Ming-Yen
Shih, M. H.
Kuo, Hao-Chung
光電工程學系
Department of Photonics
公開日期: 19-Dec-2011
摘要: The room temperature lasing action from a metal-coated GaN nanoring cavity was observed by optical pumping. The GaN nanoring is 7 mu m in diameter and 400 nm in width. The quality factor of the cavity is approximately 860 with a threshold power density of 37.5 mJ/cm(2). Such a device performance was attributed to the combination of metal-coated nanocavity with whispering-gallery modes. Moreover, the group index extracted from the experiment was 5.99 and was verified with calculations and analyses of the lasing modes as well as their characteristics. The study showed a promising way to further improve the performance of metal-coated nanolasers. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3671648]
URI: http://dx.doi.org/10.1063/1.3671648
http://hdl.handle.net/11536/15356
ISSN: 0003-6951
DOI: 10.1063/1.3671648
期刊: APPLIED PHYSICS LETTERS
Volume: 99
Issue: 25
結束頁: 
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