期刊
APPLIED PHYSICS LETTERS
卷 100, 期 6, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3681944
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资金
- Defense Advanced Research Projects Agency CMUVT
- Photon Systems Inc. (U.S. Army) [W911NF-11-1-0034]
Deep-UV optical gain has been demonstrated in Al0.7Ga0.3N/AlN multiple quantum wells under femtosecond optical pumping. Samples were grown by molecular beam epitaxy under a growth mode that introduces band structure potential fluctuations and high-density nanocluster-like features within the AlGaN wells. A maximum net modal gain value of 118 +/- 9 cm(-1) has been measured and the transparency threshold of 5 +/- 1 mu J/cm(2) was experimentally determined, corresponding to 1.4 x 10(17) cm(-3) excited carriers. These findings pave the way for the demonstration of solid-state lasers with sub-250 nm emission at room temperature. (C) 2012 American Institute of Physics. [doi:10.1063/1.3681944]
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