【Member Papers】The impact of many-body effects on the properties of β-(AlGa)₂O₃/Ga₂O₃ quantum cascade structure.

      Dr. Liu Yan from The Fourth-Generation Materials and Devices Research Group of Shenzhen Pinghu Laboratory recently published a paper titled " The impact of many-body effects on the properties of β-(AlGa)₂O₃/Ga₂O₃ quantum cascade structure." in the Journal of Applied Physics

      This paper studies the many-body effect in the β-(AlGa)₂O₃/Ga₂O₃ quantum cascade structure through numerical solutions and explores the influence of the many-body effect on the conduction band structure and the transition absorption characteristics between subbands. The results show that at a certain temperature, the static many-body effect significantly increases the peak absorption coefficient corresponding to the subband transition, while the dynamic many-body effect causes a clear blue shift in the absorption peak. It provides a reference for analyzing the absorption characteristics of β-(AlGa) ₂O₃/Ga₂O₃ subband transitions, and offers a theoretical basis and design ideas for future development of long-wave infrared subband optoelectronic devices based on β-(AlGa)₂O₃/Ga₂O₃.

Figure 1. Schematic diagram of the device based on the quantum cascade structure of β-(AlGa)₂O₃/Ga₂O₃

Figure 2. Many-body effect on conduction band structure

Figure 3. Many-body effect on absorption characteristics

DOI:

https://doi.org/10.1063/5.0254625