Excitonic Magnetoabsorption of Cylindrical Quantum Disks |
| P. Schillak and G. Czajkowski
-8ptUniversity of Technology and Life Sciences, Bydgoszcz, Poland |
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| We show how to compute the optical functions (the complex magnetosusceptibility, dielectric function, magnetoreflection) for semiconductor quantum disks exposed to a uniform: magnetic field in the growth direction, including the excitonic effects. The method uses the microscopic calculation of nanostructure excitonic wave functions and energy levels, and the macroscopic real density matrix approach to compute the electromagnetic fields and susceptibilities. The electron-hole screened Coulomb potential is adapted and the valence band structure is taken into account in the cylindrical approximation, thus separating light- and heavy-hole motions. The confinement potentials are taken as step-like both in the z and in-plane directions. Numerical calculations have been performed for In0.55Al0.45As (disk)/Al0.35Ga0.65As (barrier) and InP/GaP disks and the results are in a good agreement with the available experimental data. |
| DOI: 10.12693/APhysPolA.120.888 PACS numbers: 78.67.Hc, 73.22.Dj, 73.21.La, 71.35.Ji |