Sun Yong, Yang Yaping, Chen Hong, Zhu Shiyao
Key Laboratory of Advanced Micro-structure Materials (MOE) and School of Physics Sciences and Engineering, Tongji University, Shanghai 200092, China.
Beijing Computational Science Research Center, Beijing 100084, China.
Sci Rep. 2015 Nov 16;5:16370. doi: 10.1038/srep16370.
The influence of the dephasing on interference is investigated theoretically and experimentally in three-level electromagnetically induced transparency systems. The nature of the interference, constructive, no interference or destructive, can be controlled by adjusting the dephasing rates. This new phenomenon is experimentally observed in meta-atoms. The physics behind the dephasing-induced control of interference nature is the competing between stimulated emission and spontaneous emission. The random phase fluctuation due to the dephasing will result in the correlation and anti-correlation between the two dressed states, which will enhance and reduce the stimulated emission, respectively.
在三能级电磁诱导透明系统中，从理论和实验两方面研究了退相移对干涉的影响。通过调整退相移速率，可以控制干涉的性质，即相长干涉、无干涉或相消干涉。在超原子中通过实验观察到了这种新现象。退相移诱导干涉性质控制背后的物理原理是受激辐射和自发辐射之间的竞争。退相移引起的随机相位涨落将导致两个缀饰态之间的关联和反关联，这将分别增强和减弱受激辐射。
