Investigation of spontaneous emission from quantum dots embedded in two-dimensional photonic-crystal slab
Investigation of spontaneous emission from quantum dots embedded in two-dimensional photonic-crystal slab
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DOI：
10.1049/el:20053011
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发表时间：
2005-12-08
影响因子：
1.1
通讯作者：
Noda, S
中科院分区：
文献类型：
--
作者：
Kounoike, K;Yamaguchi, M;Noda, S
从激发载流子重分布的角度研究了嵌入二维光子晶体（PC）板中的量子点的自发发射。发现量子点的二维光子带隙效应和三维载流子约束效应使SE寿命增加了15倍，接近理论预测值。通过激振载流子再分配，垂直方向的发射效率同时提高了15倍。在PC内引入人工点缺陷空腔，导致极低的激发功率密度< 0.4 W的空腔模式发射。厘米(2)。
Investigated is spontaneous emission (SE) from quantum dots (QDs) embedded within a 2D, photonic crystal (PC) slab, from the viewpoint of redistribution of the excited carriers. SE lifetime was found to increase up to 15-fold, close to theoretically predicted value, by the 2D photonic-bandgap effect and 3D carrier confinement effect of QDs. Emission efficiency in the vertical direction was simultaneously increased 15-fold by excited-carrier redistribution. An artificial pointdefect cavity introduced within the PC led to cavity-mode emission at extremely low excitation-power densities < 0.4 W . cm(-2).