• Corpus ID: 102497487

High responsivity, low dark current ultraviolet photodetector based on AlGaN/GaN interdigitated transducer

@article{Satterthwaite2018HighRL,
  title={High responsivity, low dark current ultraviolet photodetector based on AlGaN/GaN interdigitated transducer},
  author={Peter F. Satterthwaite and Ananth Saran Yalamarthy and Noah Scandrette and A. K. M. Newaz and Debbie G. Senesky},
  journal={arXiv: Applied Physics},
  year={2018}
}
An ultraviolet (UV) photodetector employing the two-dimensional electron gas (2DEG) formed at the AlGaN/GaN interface as an interdigitated transducer (IDT) is characterized under optical stimulus. The 2DEG-IDT photodetector exhibits a record high normalized photocurrent-to-dark current ratio (NPDR, $6\times10^{14}$). In addition, we observe a high responsivity ($7,800$ A/W) and ultraviolet-visible rejection-ratio ($10^{6}$), among the highest reported values for any GaN photodetector… 

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