کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
849372 909264 2014 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The control of the nonlinear optical response of semiconductor quantum dots
ترجمه فارسی عنوان
کنترل پاسخ نوری غیر خطی نقاط کوانتومی نیمه هادی
کلمات کلیدی
نقطه کوانتومی، تصحیح نوری نویسی دوم، اکسیتون
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی

In the present work, we investigate the nonlinear optical properties emerged from excitonic features in an experimentally realized spherical parabolic semiconductor quantum dot (QD). The lowest exciton states together with relevant wave functions are calculated through the expansion method with direct matrix diagonalization method within the effective mass approximation. The effect of the size of QD and confinement potential in exciton state is studied in details. Results show that with increasing the size of the QD the energy of exciton decreases because of decreasing of the effect of coulomb potential. Using the compact density matrix formalism second order nonlinear optical rectification (χ(2)χ(2)) are obtained. By means of the applied electric and magnetic field we manipulate the exciton states and control the nonlinear optical response in a typical GaAs, InAs, CdSe QDs. Our model system presents a way to control the performance of excitonic optoelectronic devices based on semiconductor nanostructures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optik - International Journal for Light and Electron Optics - Volume 125, Issue 23, December 2014, Pages 6926–6929
نویسندگان
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