Theoretical studies of tunneling effect on absorption spectrum of a quantum well with applied electric field

1992 ◽  
Vol 71 (3) ◽  
pp. 1383-1387 ◽  
Author(s):  
H. S. Li ◽  
K. L. Wang
Keyword(s):  
Absorption Spectrum ◽  
Electric Field ◽  
Quantum Well ◽  
Applied Electric Field ◽  
Tunneling Effect ◽  
Theoretical Studies

OPTICAL INTERSUBBAND TRANSITIONS AND BINDING ENERGIES OF DONOR IMPURITIES IN Ga1-xInxNyAs1-y/GaAs/Al0.3Ga0.7As QUANTUM WELL UNDER THE ELECTRIC FIELD

2012 ◽  
Vol 26 (06) ◽  
pp. 1250013 ◽  
Author(s):  
F. UNGAN ◽  
U. YESILGUL ◽  
E. KASAPOGLU ◽  
H. SARI ◽  
I. SOKMEN
Keyword(s):  
Binding Energy ◽  
Optical Absorption ◽  
Electric Field ◽  
Quantum Well ◽  
Applied Electric Field ◽  
Shallow Donor ◽  
Binding Energies ◽  
Intersubband Transitions ◽  
Mass Approximation ◽  
Intersubband Optical Absorption

The effects of nitrogen and indium mole concentration on the intersubband optical absorption for (1–2) transition and the binding energy of the shallow-donor impurities in a Ga 1-x In x N y As 1-y/ GaAs / Al 0.3 Ga 0.7 As quantum well under the electric field is theoretically calculated within the framework of the effective-mass approximation. Results are obtained for several concentrations of nitrogen and indium, and the applied electric field. The numerical results show that the intersubband transitions and the impurity binding energy strongly depend on the nitrogen and indium concentrations.

ELECTRO-OPTIC EFFECT IN A SEMI-PARABOLIC QUANTUM WELL WITH AN APPLIED ELECTRIC FIELD

2003 ◽  
Vol 17 (09) ◽  
pp. 347-354 ◽  
Author(s):  
LI ZHANG ◽  
HONG-JING XIE
Keyword(s):  
Electric Field ◽  
Quantum Well ◽  
Applied Electric Field ◽  
Field Effect ◽  
Harmonic Oscillation ◽  
Electric Field Effect ◽  
Confining Potential ◽  
Compact Density ◽  
Electro Optic ◽  
Potential Frequency

By using the compact density matrix approach, the electro-optic effect (EOE) in a semi-parabolic quantum well (QW) with an applied electric field has been theoretically investigated. Via a variant of displacement harmonic oscillation, the exact electronic states in the semi-parabolic QW with an applied electric field are obtained. Numerical results on typical GaAs material reveal that the electro-optic effect nearly linearly increases with the increasing of magnitude of the electric field, but it monotonously decreases with the increasing of confining potential frequency of the semi-parabolic QW. The EOE in the model investigated is 102 times larger than that in the symmetric parabolic QW under the same electric field and the same frequency of parabolic confining potential, which is due to the self-asymmetry of the system and the electric field effect.

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