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