Energy Transfer within Ultralow Density Twin InAs Quantum Dots Grown by Droplet Epitaxy
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- 作者：Bao-Lai Liang ; Zhi-Ming Wang ; Xiao-Yong Wang ; Ji-Hoon Lee ; Yuriy I. Mazur ; Chih-Kang Shih ; Gregory J. Salamo
- 刊名：ACS Nano
- 出版年：2008
- 出版时间：November 25, 2008
- 年：2008
- 卷：2
- 期：11
- 页码：2219-2224
- 全文大小：324K
- 年卷期：0
- ISSN：1936-086X
文摘
Ultralow density (∼106/cm2) 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 (∼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 QD molecule.