Spectrally resolved four-wave mixing experiments in the vicinity of trion and exciton resonances in doped CdTe/CdMgZnTe quantum wells

Authors
Gilliot, P Kudrna, J Brinkmann, D Cregut, O Ohlmann, D Levy, R Arnoult, A Cibert, J Tatarenko, S
Citation
P. Gilliot et al., Spectrally resolved four-wave mixing experiments in the vicinity of trion and exciton resonances in doped CdTe/CdMgZnTe quantum wells, ANN PHYSIQ, 23, 1998, pp. 177-178
Citations number
8
Categorie Soggetti
Physics
Journal title
ANNALES DE PHYSIQUE
ISSN journal
00034169 → ACNP
Volume
23
Year of publication
1998
Supplement
C1
Pages
177 - 178
Database
ISI
SICI code
0003-4169(1998)23:<177:SRFMEI>2.0.ZU;2-A
Abstract
We study the dephasing behaviour of neutral (X) and positively charged (X+) excitons in modulation doped CdTe/Cd0.69Mg0.23Zn0.08Te multiple quantum we lls by means of spectrally resolved transient four-wave mixing. The photon echo traces show modulations due to quantum beats or polarisation interfere nces between both resonances with a period determined by their energy split ting. The spectral resolution of the four-wave mixing signal allows a separ ate determination of the dephasing times of the two quasiparticles.