具有动态核极化的半导体微腔中的光擦除无序
Optically erasing disorder in semiconductor microcavities with dynamic nuclear polarization
摘要：
发现光子无序的均方值在典型的GaAs基微腔中减少了100倍，当暴露于圆偏振连续波光泵时，没有任何特殊的空间图案。腔模的共振激发激发了空间非均匀分布的自旋极化电子，这取决于光子的无序分布。电子通过超精细接触相互作用将自旋转移到原子核，从而诱导能够修改激子-极化激元的电势的长寿命Overhauser磁场。
英文摘要：
The mean squared value of the photonic disorder is found to be reduced by a factor of 100 in a typical GaAs based microcavity, when exposed to a circularly polarized continuous wave optical pump without any special spatial patterning. Resonant excitation of the cavity mode excites a spatially non-uniform distribution of spin-polarized electrons, which depends on the photonic disorder profile. Electrons transfer spin to nuclei via the hyperfine contact interaction, inducing a long-living Overhauser magnetic field able to modify the potential of exciton-polaritons.
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