Picosecond dynamics and high-density excitation effect of excitons in ZnSe/ZnMgSSe quantum-wells

被引：0
|
作者：
Tanaka, K [1 ]
Itoh, A [1 ]
Ando, T [1 ]
Hataoka, S [1 ]
Tanahashi, I [1 ]
机构：
[1] Kyoto Univ, Dept Phys, Sakyo Ku, Kyoto 6068224, Japan
来源：
PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON EXCITONIC PROCESSES IN CONDENSED MATTER - EXCON '98 | 1998年 / 98卷 / 25期
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D O I：
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中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Biexciton luminescence is observed in the low energy side of the heavy-hole exciton luminescence in ZnSe/ZnMgSSe quantum-wells under high-density excitation condition. The binding energy of the biexciton is estimated as similar to 8 meV. We performed spectrally resolved four-wave mixing (SR-FWM) measurements around the exciton resonance in the reflection geometry. Transient oscillatory behavior of the FWM signal is observed at the exciton and biexciton luminescence energies. The polarization and delay time dependence of FWM signal is understood satisfactory by a 5-levels. The oscillation is interpreted as a quantum beat between the biexciton and a weakly bound two-exciton state.
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页码：198 / 203
页数：6
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