期刊
NANO LETTERS
卷 10, 期 1, 页码 313-317出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl903592h
关键词
Auger processes; quantum dot; quantum well; quantum wire; nanocrystal blinking; laser threshold
类别
资金
- Office of Naval Research
- Alexander von Humboldt Foundation
- National Research Council Associateship Program
We explore how the size and shape of the microscopic confinement potential affects the nonradiative Auger decay rate of confined carriers. Calculations conducted in the two-band, effective mass Kane model unambiguously show that smoothing out the confinement Potential could reduce the rate by more than 3 orders of magnitude relative to the rate in structures with abruptly terminating boundaries. As the confinement potential width is increased, the calculated rate decreases overall, exhibiting very deep minima at regular widths. Such minima suggest that nanocrystals of magic sizes can exist for which nonradiative Auger processes are strongly suppressed.
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