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

Davit A. Baghdasaryan; David B. Hayrapetyan; Hayk A. Sarkisyan; Eduard M. Kazaryan; Sergey I. Pokutnyi

doi:10.1117/1.JNP.11.046004

13 October 2017 Exciton states and direct interband light absorption in the ensemble of toroidal quantum dots

Davit A. Baghdasaryan, David B. Hayrapetyan, Hayk A. Sarkisyan, Eduard M. Kazaryan, Sergey I. Pokutnyi

Author Affiliations +

Journal of Nanophotonics, Vol. 11, Issue 4, 046004 (October 2017). https://doi.org/10.1117/1.JNP.11.046004

Abstract

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.

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Davit A. Baghdasaryan, David B. Hayrapetyan, Hayk A. Sarkisyan, Eduard M. Kazaryan, and Sergey I. Pokutnyi "Exciton states and direct interband light absorption in the ensemble of toroidal quantum dots," Journal of Nanophotonics 11(4), 046004 (13 October 2017). https://doi.org/10.1117/1.JNP.11.046004

Received: 2 June 2017; Accepted: 26 September 2017; Published: 13 October 2017

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