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- W2017171306 abstract "Effects of delta doping location and density on intersubband transitions in AlGaN/GaN step quantum wells for terahertz (THz) applications have been investigated by solving Schrödinger and Poisson equations self-consistently. It shows that delta doping near the GaN well/AlGaN step well interface causes a blue-shift, while delta doping in the barrier or near barrier/GaN well and barrier/step well interfaces cause a red-shift first and then a blue-shift with increasing doping density. The shifts are attributed to the combination of many body effect and internal field modulation effect, and can be more than 200% or 70% of the e1–e2 transition energy, as for blue-shift or red-shift, respectively. In addition, the influences of delta-doping location and density on the absorption coefficient are also investigated in detail. Delta doping at the middle of a layer is found much more desirable over uniform-doping in order to improve the absorption coefficient, especially in the step well." @default.
- W2017171306 created "2016-06-24" @default.
- W2017171306 creator A5028283138 @default.
- W2017171306 creator A5051609174 @default.
- W2017171306 date "2015-05-01" @default.
- W2017171306 modified "2023-10-02" @default.
- W2017171306 title "Influence of delta doping on intersubband transition and absorption in AlGaN/GaN step quantum wells for terahertz applications" @default.
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- W2017171306 doi "https://doi.org/10.1016/j.physe.2015.01.023" @default.
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