کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1535729 1512630 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optical properties of an exciton in a two-dimensional quantum ring with an applied magnetic field
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Optical properties of an exciton in a two-dimensional quantum ring with an applied magnetic field
چکیده انگلیسی
We study theoretically the optical properties of an exciton in a two-dimensional quantum ring both including harmonic dot and antidot potentials in the presence of a strong magnetic field. Calculations are made by using the perturbation method and the compact density-matrix approach within the effective-mass approximation. Based on the computed energies and wave functions, the linear, third-order nonlinear and total optical absorption coefficients as well as the refractive index changes have been examined. The results show that the optical properties of an exciton in a two-dimensional ring both including harmonic dot and antidot potentials are strongly affected by the zero point of the pseudoharmonic potential, the chemical potential of the electron gas and the applied magnetic field. The larger optical nonlinearity will be obtained by varying the zero point of the pseudoharmonic potential compared to the chemical potential of electron gas and the applied magnetic field.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 291, 15 March 2013, Pages 386-389
نویسندگان
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