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首页> 外文期刊>Physica, B. Condensed Matter >Free exciton spin and recombination dynamics in high-purity AlGaAs layers
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Free exciton spin and recombination dynamics in high-purity AlGaAs layers

机译：高纯AlGaAs层中的自由激子自旋和复合动力学

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摘要

The effect of a transverse magnetic field on circularly polarized free exciton photoluminescence of ultra-high-purity AlGaAs layers (Hanle effect) has been investigated. An unusual shape of the Hanle curves was found. The Hanle curve is a superposition of two Lorentzian contours, the widths of which differ approximately by a factor of 10. Two additional maxima are situated symmetrically relative to zero magnetic field. The superposition of Lorentzian contours is explained by depolarization of free excitons, formed via geminate and bimolecular processes, respectively. The effect of depolarization of free electrons taking place before binding in excitons is also taken into account. The origin of the weak satellite peaks is unclear up to now. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 12]
机译：研究了横向磁场对超高纯AlGaAs层的圆极化自由激子光致发光的影响（汉勒效应）。发现了不寻常的Hanle曲线形状。 Hanle曲线是两个Lorentzian轮廓的叠加，轮廓的宽度相差大约10倍。另外两个最大值相对于零磁场对称放置。洛伦兹轮廓的叠加是通过自由激子的去极化来解释的，自由激子分别通过双峰和双分子过程形成。还考虑了自由电子在激子中结合之前发生的去极化作用。到目前为止，卫星峰值的起源尚不清楚。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：12]

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