کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1553984 998764 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Temperature dependence of electron transport in GaN/AlGaN quantum cascade detectors
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Temperature dependence of electron transport in GaN/AlGaN quantum cascade detectors
چکیده انگلیسی

In this work we investigate the influence of extractor design and temperature on transport properties of quantum cascade detector. For this purpose we realize numerical calculation of electron lifetimes considering electron–phonon and electron impurities scattering. Electron–phonon interactions are treated using Fermi Golden Rule which allows to calculate lifetime of carriers with temperature and structure design taking into account. Transport characteristics of the quantum cascade detectors have been computed using density matrix theory. As a result, we have obtained the system of ordinary differential equations describing dynamics of electron distribution functions and intersubband correlations. Managing carrier lifetime in quantum wells gives us possibility to make device response faster. Also carrier lifetime is the relevant characteristic, allows us to calculate a lot of parameters such as quantum efficiency and photocurrent.


► We theoretically investigate the GaN/(AlN/AlGaN) quantum cascade photodetector.
► Modeling of electron transport and optical response of the cascade detector is based on the density matrix theory.
► Increasing temperature leads to growing of device operating speed.
► The response of investigated GaN/AlGaN quantum cascade photodetector amounts 50 ps for 300 °C.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Superlattices and Microstructures - Volume 52, Issue 4, October 2012, Pages 894–900
نویسندگان
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