Excitonic Energy Shifts in CdMnTe/CdMgTe Quantum Wells under Resonant Excitation in Presence of 2D Carrier Gas

• Authors: A. Trajnerowicz , A. Golnik , P. Kossacki , W. Bardyszewski , M. Wiater , G. Karczewski , T. Wojtowicz
• Languages of publication: EN

Abstracts

EN

Systematic studies of amplitude and energy changes of excitonic lines in a strong excitation regime were carried out by a pump-probe method. The series of samples containing quantum wells with well width from 80 Åto 140 Åwas investigated. One 80 Åsample was n-doped with iodine, the rest of the quantum wells were intentionally undoped but contained a 2D gas of free holes. Its density could be varied by changing an intensity of additional illumination. The resonant creation of high population of e1hh1 excitons causes the energetic blue shift of the same due to interactions between excitons. The blue shifts did not depend on the concentration of 2D gas of carriers whereas it did depend on the power of excitation beam. Model calculations of absorption show qualitative agreement with the experimental data.

Keywords

EN

78.67.De; 71.35.Lk; 78.47.-p

Discipline

• 71.35.Lk: Collective effects (Bose effects, phase space filling, and excitonic phase transitions)
• 78.67.De: Quantum wells
• 78.47.-p: Spectroscopy of solid state dynamics

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 5
• Pages: 1403-1409

Dates

published

2008-11

received

2008-06-07

Contributors

author

A. Trajnerowicz

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

author

A. Golnik

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

author

P. Kossacki

• Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

author

W. Bardyszewski

• Institute of Theoretical Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

author

M. Wiater

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

author

G. Karczewski

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

author

T. Wojtowicz

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

References

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Identifiers

DOI

10.12693/APhysPolA.114.1403