کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1536966 996577 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Excited state absorptions of an exciton bound to an ionized donor impurity in quantum dots
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Excited state absorptions of an exciton bound to an ionized donor impurity in quantum dots
چکیده انگلیسی

An investigation of an exciton bound in a parabolic two dimensional quantum dot by a donor impurity has been carried out by using the matrix diagonalization method and the compact density-matrix approach. The linear, third-order nonlinear, total optical absorption coefficients and refractive index changes have been calculated for the s-p, p-d, and d-f transitions. The results show that the parabolic potential has a great effect on the optical absorptions. The calculated results also reveal that as the angular momentum quantum numbers of transitions increase, the optical absorption and refractive index peaks shift towards lower energies and the absorption and refractive index intensities increase.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 284, Issue 24, 1 December 2011, Pages 5730–5733
نویسندگان
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