期刊
ACS NANO
卷 2, 期 11, 页码 2219-2224出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn800224p
关键词
twin InAs quantum dots; quantum dot molecule; photoluminescence; energy transfer; coupling
类别
资金
- NSF [DMR-0520550, DMR-0210383, DMR-0606485]
Ultralow density (similar to 10(6)/cm(2)) of twin InAs quantum dot (QD) hybrid structure was grown by a droplet epitaxy technique. The photoluminescence (PL) from ensemble and individual twin InAs QD structures showed a bimodal behavior and an energy transfer between the well-separated (similar to 190 nm) twin QDs, which was supposedly due to the special wetting ring that built the channel for exciton transfer. This research demonstrates a novel approach to fabricate lateral InAs QD pairs as the candidate for a laterally coupled OD molecule.
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