Coherent dynamics of excitons and excitonic complexes in ZnSe epilayers

被引：17

作者：

Neukirch, U

Weckendrup, D

Wundke, K

Gutowski, J

机构：

[1] UNIV BREMEN,BERICH HALBLEITEREPITAXIE,INST FESTKORPERPHYS,D-28334 BREMEN,GERMANY

[2] UNIV WURZBURG,INST PHYS,D-97074 WURZBURG,GERMANY

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 1996年 / 13卷 / 06期

关键词：

D O I：

10.1364/JOSAB.13.001256

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The contribution of bound excitons and biexcitons to degenerate four-wave mixing signals is investigated in high-quality biaxially strained ZnSe layers. For the former complexes signatures of polarization interference with free excitons are found in time-resolved four-wave mixing, whereas spectrally resolved data point to the occurrence of quantum beating. Thus this system behaves as a mixture of independent two-level systems on the one hand and three-level systems on the other. Biexcitons contribute to the signal mainly at negative delay between the exciting pulses and are identified by means of spectrally resolved measurements and by use of different configurations of the pulse polarization. Complete agreement is found between the selection rules for biexcitons (and excitons) and the experimental data. (C) 1996 Optical Society of America

引用

页码：1256 / 1262

页数：7

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