Exciton states and direct interband light absorption in the ensemble of toroidal quantum dots

被引：1
|
作者：
Baghdasaryan, Davit A. [1 ]
Hayrapetyan, David B. [1 ]
Sarkisyan, Hayk A. [1 ,2 ,3 ]
Kazaryan, Eduard M. [1 ]
Pokutnyi, Sergey I. [4 ]
机构：
[1] Russian Armenian Univ, Dept Gen Phys & Quantum Nanostruct, Yerevan, Armenia
[2] Yerevan State Univ, Dept Solid State Phys, Yerevan, Armenia
[3] Peter Great St Petersburg Polytech Univ, Dept Semicond & Nanoelect, St Petersburg, Russia
[4] Natl Acad Sci Ukraine, Chuiko Inst Surface Chem, Kiev, Ukraine
来源：
JOURNAL OF NANOPHOTONICS | 2017年 / 11卷 / 04期
关键词：
exciton states; toroidal quantum dot; interband absorption; oscillator strengths; ELECTRONIC STATES; RINGS;
D O I：
10.1117/1.JNP.11.046004
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
One electron and exciton states in toroidal quantum dot (QD) have been considered. The convenient coordinate system has been defined and the Schrodinger equation has been solved in these coordinates. The electron energy spectrum and wave function dependence on the geometrical parameters of toroidal QD have been obtained. The comparison with the results obtained by numerical methods has been done. Optical absorption has been considered in both cases of "small" toroid when the interaction of an electron and a hole is neglected and cases of relatively "large" toroid when the correlation between the particles has been taken into account. Interband optical transitions have been considered in the ensemble of toroidal QDs. The selection rules for quantum transitions and absorption edge dependence on the geometrical parameters have been obtained. (C) 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
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页数：10
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