Few-body magneto-absorption in prolate ellipsoidal quantum dot

Intersubband optical absorption coefficient and refractive index changes of a weakly prolate ellipsoidal quantum dot, using the compact-density matrix formalism and iterative method, are investigated. In this regard, the linear and nonlinear intersubband optical absorption coefficient and refractive index changes of a GaAs / Al x Ga 1-x As ellipsoidal quantum dot, as functions of the dot radius, ellipticity constant, stoichiometric ratio and incident light intensity are calculated. The results indicate that absorption coefficient and refractive index changes strongly depend on the light intensity, size and geometry of the dot and structure parameters such as aluminium concentration in GaAs / Al x Ga 1-x As structures.

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The energy spectrum of charge carriers in a strongly oblate ellipsoidal quantum dot

Technical Physics Letters ◽

10.1134/1.1505553 ◽

2002 ◽

Vol 28 (8) ◽

pp. 693-695

Author(s):

G. G. Zegrya ◽

O. V. Konstantinov ◽

A. V. Matveentsev

Keyword(s):

Energy Spectrum ◽

Quantum Dot ◽

Charge Carriers ◽

Ellipsoidal Quantum Dot

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Implementation of Kohn's theorem for the ellipsoidal quantum dot in the presence of external magnetic field

Physica E Low-dimensional Systems and Nanostructures ◽

10.1016/j.physe.2015.09.047 ◽

2016 ◽

Vol 75 ◽

pp. 353-357 ◽

Cited By ~ 16

Author(s):

D.B. Hayrapetyan ◽

E.M. Kazaryan ◽

H.A. Sarkisyan

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Quantum Dot ◽

Ellipsoidal Quantum Dot

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Long-wave Absorption of Few-Hole Gas in Prolate Ellipsoidal Ge/Si Quantum Dot: Implementation of Analytically Solvable Moshinsky Model

Nanomaterials ◽

10.3390/nano10101896 ◽

2020 ◽

Vol 10 (10) ◽

pp. 1896

Author(s):

David B. Hayrapetyan ◽

Eduard M. Kazaryan ◽

Mher A. Mkrtchyan ◽

Hayk A. Sarkisyan

Keyword(s):

Energy Spectrum ◽

Quantum Dot ◽

Heavy Hole ◽

Center Of Mass ◽

Pair Interaction ◽

One Dimensional ◽

Long Wave ◽

Si Quantum Dot ◽

Specific Geometry ◽

Prolate Ellipsoidal

In this paper, the behavior of a heavy hole gas in a strongly prolate ellipsoidal Ge/Si quantum dot has been investigated. Due to the specific geometry of the quantum dot, the interaction between holes is considered one-dimensional. Based on the adiabatic approximation, it is shown that in the z-direction, hole gas is localized in a one-dimensional parabolic well. By modeling the potential of pair interaction between holes in the framework of oscillatory law, the problem is reduced to a one-dimensional, analytically solvable Moshinsky model. The exact energy spectrum of the few-hole gas has been calculated. A detailed analysis of the energy spectrum is presented. The character of long-wave transitions between the center-of-mass levels of the system has been obtained when Kohn theorem is realized.

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