Degree of circular polarization in II-VI diluted magnetic semiconductor quantum dots

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• 作者：Shivani Rana^a ; Pratima Sen^a ; ^{pratimasen@gmail.com} ; Pranay Kumar Sen^b
• 关键词：A. Semiconductors ; A. Nanostructures ; A. Magnetic materials ; D. Electronic structure ; D. Optical properties
• 刊名：Journal of Physics and Chemistry of Solids
• 出版年：2012
• 出版时间：July, 2012
• 年：2012
• 卷：73
• 期：7
• 页码：896-901
• 全文大小：338 K

文摘

Degree of circular polarization (DCP) in II-VI diluted magnetic semiconductor quantum dots (QDs) has been studied analytically. Energy levels have been calculated using Luttinger-Kohn Hamiltonian and effective mass approximation. Effects due to application of externa magnetic field have been investigated, followed by calculation of transition dipole moment and DCP. Numerical estimates made for Mn-doped CdSe/ZnSe QDs show that DCP in undoped QDs is negligible while transition metal ion doping yields substantial polarization rotation () even at moderate magnetic fields ().