Theoretical Investigation of effects of Size Variations and External Magnetic Field on Binding Energy and Center Frequency in InGaAs/GaAs Quantum Dot Slow Light Devices

2019 ◽  
Author(s):  
Bahram Choupanzadeh ◽  
Hassan Kaatuzian
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Binding Energy ◽  
Quantum Dot ◽  
Theoretical Investigation ◽  
Slow Light ◽  
Center Frequency ◽  
Gaas Quantum Dot

scholarly journals Effective tuning of the charge state of a single InAs/GaAs quantum dot by an external magnetic field

2008 ◽  
Vol 78 (7) ◽  
Author(s):  
E. S. Moskalenko ◽  
L. A. Larsson ◽  
M. Larsson ◽  
P. O. Holtz ◽  
W. V. Schoenfeld ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Quantum Dot ◽  
Charge State ◽  
Gaas Quantum Dot

SPIN-SPLITTING OF THE BOUND POLARON'S GROUND STATE BINDING ENERGY INDUCED BY THE RASHBA SPIN–ORBIT INTERACTION UNDER THE PERPENDICULAR MAGNETIC FIELD

2008 ◽  
Vol 22 (12) ◽  
pp. 1923-1932
Author(s):  
JIA LIU ◽  
ZI-YU CHEN
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Binding Energy ◽  
Ground State ◽  
Spin Splitting ◽  
Perpendicular Magnetic Field ◽  
Spin Orbit ◽  
Ground State Binding Energy ◽  
Bound Polaron ◽  
Rashba Spin

The influence of a perpendicular magnetic field on a bound polaron near the interface of a polar–polar semiconductor with Rashba effect has been investigated. The material is based on a GaAs / Al x Ga 1-x As heterojunction and the Al concentration varying from 0.2 ≤ x ≤ 0.4 is the critical value below which the Al x Ga 1-x As is a direct band gap semiconductor.The external magnetic field strongly altered the ground state binding energy of the polaron and the Rashba spin–orbit (SO) interaction originating from the inversion asymmetry in the heterostructure splitting of the ground state binding energy of the bound polaron. How the ground state binding energy will be with the change of the external magnetic field, the location of a single impurity and the electron area density have been shown in this paper, taking into account the SO coupling. The contribution of the phonons are also considered. It is found that the spin-splitting states of the bound polaron are more stable, and, in the condition of weak magnetic field, the Zeeman effect can be neglected.

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