Brown Benjamin L, Dicks Alexander J, Walmsley Ian A
Clarendon Laboratory, Department of Physics, University of Oxford, UK.
Phys Rev Lett. 2006 May 5;96(17):173002. doi: 10.1103/PhysRevLett.96.173002.
We have studied the effects of chirped femtosecond laser pulses on the formation of ultracold molecules in a Rb magneto-optical trap. We have found that application of chirped femtosecond pulses suppressed the formation of (85)Rb and (87)Rb(2) a(3)sigma(+)(u) molecules in contrast to comparable nonchirped pulses, cw illumination, and background formation rates. Variation of the amount of chirp indicated that this suppression is coherent in nature, suggesting that coherent control is likely to be useful for manipulating the dynamics of ultracold quantum molecular gases.
我们研究了啁啾飞秒激光脉冲对铷磁光阱中超冷分子形成的影响。我们发现，与可比的非啁啾脉冲、连续波照明和背景形成速率相比，啁啾飞秒脉冲的应用抑制了（85）Rb和（87）Rb（2）a（3）σ（+）（u）分子的形成。啁啾量的变化表明这种抑制本质上是相干的，这表明相干控制可能有助于操纵超冷量子分子气体的动力学。
