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پنجمین کنفرانس بین المللی میکروالکترونیک ایران
Light Trapping in InAsSb-based barrier Photodetectors for Enhanced Mid-Wave Infrared Bio-Medical Sensing: A Study on Jurkat Biomarker Detection
نویسندگان :
Maryam Shaveisi
1
Peiman Aliparast
2
Ng Sha Shiong
3
1- Aerospace research institute
2- Aerospace research institute
3- Universiti Sains Malaysia
کلمات کلیدی :
InAsSb،Light trapping،nBn،Bio-medical sensing،Photodetector،Mid-wave infrared
چکیده :
This work presents the performance results of InAsSb-based nBn MWIR detectors, employing a Ge/BaF2 2-stacks mirror reflector with exceptional reflectivity exceeding ~90%. The focus of our investigation is on evaluating their effectiveness for Jurkat biomarker detection. Our analysis includes a comprehensive examination of the dark current characteristics exhibited by this proposed device. Significantly, our findings reveal a remarkably low dark current level of approximately 2.032×10-5 A/cm² at 300 K, indicating its suitability for high-temperature operation. Additionally, we assess the spectral response of our device and observe peak current, responsivity and quantum efficiency values of 1.19 A/W and 0.37 respectively, when subjected to an incident light density of 1 W/cm². These metrics demonstrate impressive levels even under lower incident power densities, reaching values as high as 502.74 A/W for peak current responsivity and 155.85 for quantum efficiency when exposed to an incident power density as low as 10-3 W/cm². These significant findings validate the importance and effectiveness of utilizing light trapping methods based on Ge/BaF2 mirror reflector in enhancing detector performance within this context.
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