The effects of strain and composition on the conduction-band offset of direct band gap type-I GeSn/GeSnSi quantum dots for CMOS compatible mid-IR light source

• Main Authors: Chen, Qimiao, Zhang, Lin, Zhou, Hao, Li, Wei, Son, Bong Kwon, Tan, Chuan Seng
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2020
• Subjects: Engineering::Electrical and electronic engineering::Semiconductors; Mid-IR Light Source; GeSn Quantum Dot
• Online Access: https://hdl.handle.net/10356/141356
• Institution: Nanyang Technological University

A direct band gap type-I Ge0.75Sn0.25/Ge0.682Sn0.158Si0.16 QD heterostructure is proposed for mid-IR light sources. The effects of strain and composition are theoretically investigated to optimize the band offset of the direct band gap GeSn QDs. It is found that the introduction of tensile strain an...