標題: | Evolution of self-assembled InAs quantum ring formation |
作者: | Ling, Hong-Shi Lee, Chien-Ping 電子工程學系及電子研究所 Department of Electronics Engineering and Institute of Electronics |
公開日期: | 15-七月-2007 |
摘要: | The evolution of InAs quantum ring (QR) formation and the corresponding optical properties were investigated by atomic force microscopy (AFM) and photoluminescence (PL) spectroscopy. Just like a nanoscale volcanic eruption, the transformation from quantum dots (QDs) to QRs using the capping and annealing process depends on how much InAs is removed from the center of the dots to the surrounding areas. The final structure was found to depend on the annealing temperature and the cap layer thickness. We have investigated the QR formation at different stages using various growth conditions. The findings provided a clear picture on the mechanism of ring formation. We were able to obtain QRs with various geometries by controlling these growth parameters. (c) 2007 American Institute of Physics. |
URI: | http://dx.doi.org/10.1063/1.2761799 http://hdl.handle.net/11536/10561 |
ISSN: | 0021-8979 |
DOI: | 10.1063/1.2761799 |
期刊: | JOURNAL OF APPLIED PHYSICS |
Volume: | 102 |
Issue: | 2 |
結束頁: | |
顯示於類別: | 期刊論文 |