Coherent control of the optical phonons in GaAs is realized via paired femtosecond pulses that are relative phase-locked and have perpendicular polarizations. To investigate polarization effects, only phonon interference occurs, which contrasts previous experiments with parallel-polarized pulses, which produced as well electronic interference. The results suggest that for an n-GaAs(001) sample the diagonal components of the Raman tensor determinate in the generation of coherent longitudinal optical phonons.

中文翻译：

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垂直极化条件下相对锁相光脉冲对GaAs中光子的相干控制

通过成对的飞秒脉冲实现了GaAs中光子的相干控制，这些飞秒脉冲具有相对的相位锁定并具有垂直偏振。为了研究极化效应，仅发生声子干扰，这与先前的实验与平行极化的脉冲形成对比，后者产生了电子干扰。结果表明，对于n-GaAs（001）样品，拉曼张量的对角分量在相干纵向光学声子的生成中确定。