標題: | Miniband Formulation of Bilayer Type II Ge/Si Quantum Dot Superlattices |
作者: | Tsai, Yi-Chia Lee, Ming-Yi Li, Yiming Samukawa, Seiji 電信工程研究所 Institute of Communications Engineering |
公開日期: | 2016 |
摘要: | This article presents a computational study on the impact of layer distance on the miniband formulation and density of state under different quantum dot structural parameters-height, interdot space-in a bilayer and well-aligned Ge/Si quantum-dot array. The miniband bandwidth, energy and effective bandgap is tunable by introducing an additional quantum dot layer. When the vertical distance between layers is smaller than 2.0 nm, the individual band structure of each layer will separate and couple into a broader bandwidth. The effective bandgap decreases since the highest excited states, with broader bandwidth, mix with and become continuous energy levels. |
URI: | http://hdl.handle.net/11536/134649 |
ISBN: | 978-1-5090-1493-4 |
期刊: | 2016 IEEE 16TH INTERNATIONAL CONFERENCE ON NANOTECHNOLOGY (IEEE-NANO) |
起始頁: | 891 |
結束頁: | 894 |
顯示於類別: | 會議論文 |