کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1543968 1512872 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of lateral electric field on intraband optical absorption in concentric double quantum rings
ترجمه فارسی عنوان
تأثیر میدان الکتریکی جانبی در جذب نوری درون کانونی در حلقه های کوانتومی دوقلو
کلمات کلیدی
دو حلقه کوانتومی، خواص نوری، روش دقیق افقی میدان الکتریکی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی


• A blueshift in absorption spectrum is obtained by increasing the electric field.
• A change in light polarization creates a redshift in the absorption spectrum.
• The absorption maxima is bigger for y-polarization.
• The absorption maxima changes in a non-monotonic way if the electric field increases.
• Both blueshift and redshift of the spectrum have been obtained with the enlargement of inner ring radius.

The influence of lateral electric field on one-electron states and intraband absorption in two-dimensional concentric double quantum rings is investigated. The confining potential of the rings is modeled as a double harmonic central potential. Using the exact diagonalization technique, we calculate the dependence of the electron energy spectrum as a function of the electric field strength as well as the inner ring radius. Also, different values of confinement strength are considered. Selection rule is obtained for intraband transitions, caused by the direction of incident light polarization. The intraband absorption coefficient is calculated for different values of electric field strength, inner ring radius, confinement strength and incident light polarization direction. The combined influence of electric field strength and change of confining strength show that while the increment of the first one leads only to blueshift of absorption spectrum, the augment of the second one makes the redshift. In addition, both blueshift and redshift of the spectrum have been obtained with the enlargement of inner ring radius. Finally, we show that the absorption spectrum undergoes redshift by changing the polarization of incident light from x- to y-axis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 77, March 2016, Pages 81–89
نویسندگان
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