Bound and Resonant States of Shallow Donors in Quantum Antidots

• Authors: R. Buczko , F. Bassani
• Languages of publication: EN

Abstracts

EN

The energy spectrum and the wave functions of a shallow donor placed at the center of a spherical quantum antidot are computed within the effective mass approximation. The wave functions for discrete bound states and for continuum states are obtained in a closed form. We show that, due to the local potential of the microstructure, resonances occur in the continuum. Their energies are close to those of hydrogen-like levels lying under the top of the barrier when the quantum antidot radius is large as compared to the effective Bohr radius. The lifetimes of the resonant states and the oscillator strengths for optical transitions from the ground state are computed. We show how the energy spectrum and the oscillator strengths depend on the antidot parameters.

Keywords

EN

73.20.Dx; 78.66.-w; 71.55.-i

Discipline

• 78.66.-w: Optical properties of specific thin films(for optical properties of low-dimensional, mesoscopic, and nanoscale materials, see 78.67.-n; for optical properties of surfaces, see 78.68.+m)
• 71.55.-i: Impurity and defect levels

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1996
• Volume: 90
• Issue: 4
• Pages: 743-746

Dates

published

1996-10

Contributors

author

R. Buczko

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

author

F. Bassani

• Scuola Normale Superiore, Piazza dei Cavalieri, 56100 Pisa, Italy

Identifiers

DOI

10.12693/APhysPolA.90.743