Performance of lasers containing three, five and seven layers of quantum dots

	Performance of lasers containing three, five and seven layers of quantum dots
其他题名	论文其他题名
	Herrmann E.; Smowton P. M.; Ning Y.; Groom K. M.; Mowbray D. J.; Hopkinson M.
	2001
发表期刊	Iee Proceedings-Optoelectronics
ISSN	1350-2433
卷号	148 期号:5—6 页码:238-242
摘要	The authors have analysed the performance of quantum dot lasers containing three, five and seven layers of InGaAs quantum dots. At room temperature the threshold current density of devices of length between 320 mum and 2000 mum, with uncoated facets, decreases with device length and is lower for higher layer numbers. They explain this behaviour by analysis of measured modal gain spectra, internal optical mode loss and the temperature dependence of the threshold current density. They find that increasing the number of dot layers can improve device performance because the optical mode loss does not increase while the modal gain at a particular wavelength does increase with more dot layers. However. at low temperatures < 200 K they find that the three-layer structure exhibits the lowest threshold current density for devices of length 550 mum and longer. They conclude that the improved threshold current behaviour of the higher layer number devices at room temperature is not primarily due to intrinsic gain saturation but because the required modal gain can be achieved in high layer number samples with a lower quasi-Fermi level separation and hence a reduced population of higher lying energy states.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/25229
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Herrmann E.,Smowton P. M.,Ning Y.,et al. Performance of lasers containing three, five and seven layers of quantum dots[J]. Iee Proceedings-Optoelectronics,2001,148(5—6):238-242.
APA	Herrmann E.,Smowton P. M.,Ning Y.,Groom K. M.,Mowbray D. J.,&Hopkinson M..(2001).Performance of lasers containing three, five and seven layers of quantum dots.Iee Proceedings-Optoelectronics,148(5—6),238-242.
MLA	Herrmann E.,et al."Performance of lasers containing three, five and seven layers of quantum dots".Iee Proceedings-Optoelectronics 148.5—6(2001):238-242.

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