کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1785225 1524133 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Band structure and impurity effects on optical properties of quantum well and quantum dot infrared photodetectors
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک اتمی و مولکولی و اپتیک
پیش نمایش صفحه اول مقاله
Band structure and impurity effects on optical properties of quantum well and quantum dot infrared photodetectors
چکیده انگلیسی
We examined theoretically band structure and discrete dopant effects in the quantum well infrared photodetector (QWIP) and the quantum dot infrared photodetector (QDIP). We find that in QWIPs discrete dopant effects can induce long wavelength infrared absorption through impurity assisted intra-subband optical transitions. In QDIPs, we find that a strategically placed dopant atom in a quantum dot can easily destroy the symmetry and modify the selection rule. This mechanism could be partially responsible for normal incidence absorption observed in low-aspect-ratio quantum dots.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Infrared Physics & Technology - Volume 50, Issues 2–3, April 2007, Pages 136-141
نویسندگان
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