Biexcitons and their dephasing processes in ZnO

被引：8

作者：

Adachi, S ^{[1
]}

Hazu, K ^{[1
]}

Sota, T ^{[1
]}

Chichibu, S ^{[1
]}

Cantwell, G ^{[1
]}

Reynolds, DC ^{[1
]}

Litton, CW ^{[1
]}

机构：

[1] Hokkaido Univ, Dept Appl Phys, Sapporo, Hokkaido 0608628, Japan

来源：

FOURTH INTERNATIONAL CONFERENCE ON PHYSICS OF LIGHT-MATTER COUPLING IN NANOSTRUCTURES (PLMCN4) | 2005年 / 2卷 / 02期

关键词：

D O I：

10.1002/pssc.200460332

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated free excitons and biexcitons of bulk ZnO by time-integrated and spectrally-resolved four-wave mixing. The polarization- and wave-vector-dependent FWM signals for A and B excitons demonstrate clearly that the valence-band ordering is A - Gamma(9), B - Gamma(7), and C - Gamma(7). Next, we gave qualitative explanation of the FWM signals induced by excitons and biexcitons in ZnO. For negative delay times, bound and unbound AB-biexcitons (A exciton-B exciton correlation), which have been considered to play a minor role in GaAs heterostructures, was found to play an important role and give a significant qualitative impact to the optical response of ZnO. (c) 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：890 / 895

页数：6

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