Effective mass and conduction band dispersion of GaAsN/GaAs quantum wells

ABSTRACTUsing the envelope function formalism and the effective mass thecry, we have studied the E(k) energy dispersion and the confinement energies of the lower lying conduction band and the higher lying valence bands states in GaAs /GaAlAs Single Qantum Well (SQW) structures grown on GaAs substrates with different orientations of the growth axis :(001),(111),and (113). Then, the valence subbands dispersions are calculated away from the zone center for a given well width and under uniaxial stress for the three different growth directions

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Effect of Conduction Band Non-Parabolicity on the Nonlinear Optical Properties in GaAs/Ga1−xAlxAs Double Semi-V-shaped Quantum Wells

Materials ◽

10.3390/ma12010078 ◽

2018 ◽

Vol 12 (1) ◽

pp. 78 ◽

Cited By ~ 4

Author(s):

Zhi-Hai Zhang ◽

Jian-Hui Yuan ◽

Kang-Xian Guo ◽

Elmustapha Feddi

Keyword(s):

Quantum Wells ◽

Effective Mass ◽

Conduction Band ◽

Energy Levels ◽

Third Harmonic Generation ◽

Third Harmonic ◽

The Third ◽

Compact Density ◽

Self Consistent ◽

Energy Dependent

In this paper, we investigate the effect of conduction band non-parabolicity (NPBE) on the third harmonic generation(THG), the linear and nonlinear intersub-band optical absorption coefficients (OACs) related with electronic states of double semi-V-shaped GaAs/Ga1−xAlxAs quantum wells(QWs) by using the compact-density-matrix approach. Simultaneously, the work is performed in the position dependent effective mass in order to compute the electronic structure for the system by the finite difference and self-consistent techniques. We also compare the results with and without considering NPBE. It is found that: (1) the NPBE has a significant influence on the sub-band energy levels of double semi-V-shaped QWs, and (2) the amplitude and position of the resonant peaks of the THG and nonlinear OACs in the case of considering NPBE show complicated behavior due to the energy dependent effective mass m*(E) where the energy value was chosen self-consistently.

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BULK NONPARABOLIC EFFECTIVE MASS APPLIED TO CALCULATION OF LANDAU LEVEL ENERGY AND COMPARISON WITH CYCLOTRON RESONANCE IN InGaAs/InAlAs QUANTUM WELLS

International Journal of Modern Physics B ◽

10.1142/s0217979204027554 ◽

2004 ◽

Vol 18 (27n29) ◽

pp. 3835-3838

Author(s):

NOBUO KOTERA ◽

KOICHI TANAKA ◽

NOBORU MIURA

Keyword(s):

Quantum Well ◽

Quantum Wells ◽

Effective Mass ◽

Conduction Band ◽

Electron Energy ◽

Landau Level ◽

Cyclotron Resonance ◽

Energy Calculation ◽

Level Energy ◽

Band Nonparabolicity

Observation of band nonparabolicity is difficult because the electron energy in conduction band cannot be controlled widely. Using quantization energy in quantum well (QW) where the eigen energy is changed by QW thickness, nonparabolic effective mass inside a single QW of InGaAs was determined recently, up to 0.5 eV above bandedge. The dependence of effective mass on energy was analyzed and applied to calculate Landau level energy. Calculation fit well with cyclotron resonance experiments. Coupling between skew and normal cyclotron resonance was identified by this analysis.

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