标题： 磁场对电子三粒子系统中光子回波的控制：光学可访问态与不可访问态之间相干性的混排 显示英文标题

标题： Magnetic field control of photon echo in the electron-trion system: Shuffling of coherences between optically accessible and inaccessible states

摘要： 我们报告了在CdTe/(Cd,Mg)Te半导体量子阱中，负电荷激子的光子回波信号在磁场作用下产生的振荡现象。 振荡信号是由于电子自旋在横向磁场下的拉莫尔进动引起的，并且对激发脉冲和重聚焦脉冲的偏振配置非常敏感。 回波幅度可以根据两个脉冲之间的时间延迟和磁场强度从最大值完全调节到零。 这些结果通过考虑电子和三重态自旋能级结构的光学布洛赫方程进行解释。 显示英文摘要

摘要： We report on magnetic field induced oscillations of the photon echo signal from negatively charged excitons in a CdTe/(Cd,Mg)Te semiconductor quantum well. The oscillatory signal is due to Larmor precession of the electron spin about a transverse magnetic field and depends sensitively on the polarization configuration of the exciting and refocusing pulses. The echo amplitude can be fully tuned from maximum down to zero depending on the time delay between the two pulses and the magnetic field strength. The results are explained in terms of the optical Bloch equations accounting for the spin level structure of electron and trion.