کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1785193 | 1023304 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A new approach to quantum well infrared photodetectors: Staircase-like quantum well and barriers
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک اتمی و مولکولی و اپتیک
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چکیده انگلیسی
We present a theoretical investigation of a novel staircase-like quantum well infrared photodetector (QWIP). The proposed structure makes use of quantum wells and barriers with increasing Al content both in the wells and in the barriers forming a staircase-like energy band diagram without applied bias. The detection wavelength is around λ = 12 μm at an applied electric field of F = 1.4 Ã 104 V/cm at room temperature. Device operation is based on inter-subband bound-to-bound transition. We have solved the energy band diagram of the structure self-consistently. We have also calculated the absorption coefficient, responsivity, total net quantum efficiency and dark current density at room temperature. The dark current density at the operating field was found to be around 10â2 A/cm2, which is lower than the conventional QWIPs in the literature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Infrared Physics & Technology - Volume 48, Issue 2, June 2006, Pages 101-108
Journal: Infrared Physics & Technology - Volume 48, Issue 2, June 2006, Pages 101-108
نویسندگان
S.U. Eker, M. Hostut, Y. Ergun, I. Sokmen,