Tuning InAs quantum dots for high areal density and wideband emission

The authors report the effect of growth temperature and monolayer coverage on areal density and photoluminescence spectral width of InAs quantum dot QD . Areal density and spectral width were found to be strongly dependent on growth temperature and monolayer coverage, respectively. Upon proper t...

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Main Authors: Ngo, C. Y., Chua, S. J., Yoon, Soon Fatt, Fan, Weijun
其他作者: School of Electrical and Electronic Engineering
格式: Article
語言:English
出版: 2013
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在線閱讀:https://hdl.handle.net/10356/100821
http://hdl.handle.net/10220/18130
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機構: Nanyang Technological University
語言: English
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總結:The authors report the effect of growth temperature and monolayer coverage on areal density and photoluminescence spectral width of InAs quantum dot QD . Areal density and spectral width were found to be strongly dependent on growth temperature and monolayer coverage, respectively. Upon proper tuning, both high areal density and large photoluminescence spectral width were obtained. Areal density of 1.5 1011 cm−2 is four times higher than those previously reported, while spectral width of 136 nm is the broadest spectral width obtained without any forms of band gap engineering. These results will contribute to an improvement in the performance of QD superluminescent diode.