Binding energy and photoionization cross-section of hydrogen-like donor impurity in strongly oblate ellipsoidal quantum dot

被引：24

作者：

Hayrapetyan, D. B. ^{[1
]}

Ohanyan, G. L. ^{[1
]}

Baghdasaryan, D. A. ^{[1
]}

Sarkisyan, H. A. ^{[1
,2
,3
]}

Baskoutas, S. ^{[4
]}

Kazaryan, E. M. ^{[1
]}

机构：

[1] Russian Armenian Univ, H Emin 123, Yerevan 0051, Armenia

[2] Yerevan State Univ, A Manoogian 1, Yerevan 0025, Armenia

[3] Peter Great St Petersburg Polytech Univ, Polytech Skaya 29, St Petersburg 195251, Russia

[4] Univ Patras, Sch Nat Sci, Dept Mat Sci, GR-26504 Patras, Greece

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2018年 / 95卷

关键词：

Hydrogen-like donor impurity; Strongly oblate ellipsoidal quantum dot; Oscillator strength; Photoionization cross section; INTENSE LASER FIELD; HYDROSTATIC-PRESSURE; ELECTRIC-FIELD; OPTICAL-PROPERTIES; ELECTROSTATIC MULTIPOLES; LIGHT-ABSORPTION; MAGNETIC-FIELD; WELL-WIRES; STATES; GAAS-GA1-XALXAS;

D O I：

10.1016/j.physe.2017.09.006

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Hydrogen-like donor impurity states in strongly oblate ellipsoidal quantum dot have been studied. The hydrogen-like donor impurity states are investigated within the framework of variational method. The trial wave function constructed on the base of wave functions of the system without impurity. The dependence of the energy and binding energy for the ground and first excited states on the geometrical parameters of the ellipsoidal quantum dot and on the impurity position have been calculated. The behavior of the oscillator strength for different angles of incident light and geometrical parameters have been revealed. Photoionization cross-section of the electron transitions from the impurity ground state to the size-quantized ground and first excited states have been studied. The effects of impurity position and the geometrical parameters of the ellipsoidal quantum dot on the photoionization cross section dependence on the photon energy have been considered.

引用

页码：27 / 31

页数：5

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