Calculation of Excitonic Absorption Spectrum of GaAs Quantum Wire Free-Standing in Vacuum

• Authors: P. Vagner , D. Munzar , M. Moško
• Languages of publication: EN

Abstracts

EN

The electron-hole interaction in a thin (≈10 nm) GaAs quantum wire free-standing in vacuum is strongly enhanced by the image charge due to the abrupt permittivity drop at the wire surface. As a result, the exciton binding energies are much larger and the exciton wave functions much more localised than those of the GaAs quantum wire surrounded by the AlGaAs. The absorption spectrum of the free-standing wire shows besides the 1s exciton peak also the 3s and 5s exciton peaks, even if the peaks are 15 meV broad. The continuum absorption edge shows a large blue shift due to the renormalization of single-particle energies by the image charge.

Keywords

EN

73.20.-r; 73.20.Dx

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 92
• Issue: 5
• Pages: 1038-1042

Dates

published

1997-11

Contributors

author

P. Vagner

• Institute of Electrical Engineering, Slovak Academy of Sciences, Dúbravská cesta 9, 842 39 Bratislava, Slovak Republic

author

D. Munzar

• Department of Solid State Physics, Faculty of Science Masaryk University, Kotlářská 2, 611 37, Czech Republic

author

M. Moško

• Institute of Electrical Engineering, Slovak Academy of Sciences, Dúbravská cesta 9, 842 39 Bratislava, Slovak Republic