Stopping light via hot atoms.
Stopping light via hot atoms.
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DOI：
10.1103/physrevlett.86.628
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发表时间：
2001-01
影响因子：
8.6
通讯作者：
O. Kocharovskaya;Y. Rostovtsev;M. Scully;M. Scully
中科院分区：
文献类型：
--
作者：
O. Kocharovskaya;Y. Rostovtsev;M. Scully;M. Scully
我们证明了有可能冻结光脉冲（即，使其完全停止）或甚至通过电磁诱导透明（EIT）使其在相干驱动的多普勒展宽原子介质中的群速度为负。超低EIT极化激元的这种显著现象是基于折射率n（ω，k）的空间色散，即，它的波数依赖性，这是由于原子运动，并提供了一个负的贡献群速度。这与最近观察到的由大的时间（频率）色散引起的光变慢有关，但性质不同。
We prove that it is possible to freeze a light pulse (i.e., to bring it to a full stop) or even to make its group velocity negative in a coherently driven Doppler broadened atomic medium via electromagnetically induced transparency (EIT). This remarkable phenomenon of the ultraslow EIT polariton is based on the spatial dispersion of the refraction index n(omega,k), i.e., its wave number dependence, which is due to atomic motion and provides a negative contribution to the group velocity. This is related to, but qualitatively different from, the recently observed light slowing caused by large temporal (frequency) dispersion.