Accession Number:

ADP012957

Title:

Polaron Exciton in Spherical Quantum Dot

Descriptive Note:

Conference proceedings

Corporate Author:

RUSSIAN ACADEMY OF SCIENCES SAINT PETERSBURG IOFFE PHYSICAL-TECHNICAL INST

Report Date:

1999-06-18

Pagination or Media Count:

4.0

Abstract:

The electron and hole polaron energies are found in a quantum dot made of the materials with high iconicity. It is shown that the energy of hole polaron is larger then the energy of electron polaron due to the degeneration of the valence band. Polaron energies increase with decreasing of the quantum dot radius. In the interband optical transitions, polaron effects are partly compensated, because electron and hole create the polarization potential wells with opposite signs in the process of optical transition. It is shown that there is no total compensation when the degeneration of the valence band structure is taken into account. Therefore the interband transitions are accompanied by the polarization of the medium. The polarization leads to the intensive phonon replicas of the electron transition and to the large Stokes shift of absorption and emission light.

Subject Categories:

  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE